If the midpoint of AB is =M(−6, 2) and one endpoint is =A(−8, 7), then the coordinates of the other endpoint B is (-4, -5)
To find the coordinates of endpoint B, we can use the midpoint formula, which states that the midpoint of a line segment is the average of the coordinates of its endpoints.
The midpoint formula is
Midpoint = ((x1 + x2)/2, (y1 + y2)/2)
where (x1, y1) and (x2, y2) are the coordinates of the endpoints.
We know the coordinates of point M, which is the midpoint of the line segment AB:
M = (-6, 2)
We also know the coordinates of one endpoint of the line segment, A:
A = (-8, 7)
Let's use the midpoint formula to find the coordinates of endpoint B:
Midpoint = ((x1 + x2)/2, (y1 + y2)/2)
Substituting the values we know:
(-6, 2) = ((-8 + x2)/2, (7 + y2)/2)
Simplifying
-6 = (-8 + x2)/2 and 2 = (7 + y2)/2
Multiplying both sides of each equation by 2:
-12 = -8 + x2 and 4 = 7 + y2
Adding 8 to both sides of the first equation:
-4 = x2
Subtracting 7 from both sides of the second equation:
-5 = y2
Therefore, the coordinates of endpoint B are B = (-4, -5)
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The total resistance of a circuit is given by the formula RT = +
R1 = 4 + 6i ohms and R2 = 2 − 4i ohms. What is RT?
The total resistance of the circuit is 6 + 2i.
Resistance is a unit of measurement for the resistance to current flow in an electrical circuit. The Greek letter omega () represents the unit of measurement for resistance, which is ohms.
Georg Simon Ohm (1784–1854), a German physicist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance known as an ohm.
The amount of opposition any object applies to the flow of electric current is known as resistance. A resistor is an electrical component utilised in the circuit to provide that particular level of resistance. R = V I is a formula used to calculate an object's resistance.
given :
R1 = (4 + 6i)
R2 = (2 - 4i)
total resistance of the circuit is
R = R1 + R2
= (4 + 6i) + (2 - 4i)
= 6 + 2i
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The equation RT = + R1 = 4 + 6i ohms and R2 = 2 4i ohms, RT = 6 - 2i ohms, determines the circuit's total resistance.
R1 and R2 are added to determine RT: RT = R1 + R2.
The actual components added together give us 4 + 2 = 6.
When we add the fictitious parts, we obtain 6i - 4i = 2i.
RT is thus equal to 6 - 2i ohms.
To put it another way, the circuit's total resistance is a complex number containing a real component of 6 ohms and an imaginary component of -2 ohms. This shows the combined impact of the circuit's resistances R1 and R2. When a constant voltage differential of one volt (V) is supplied to two conductor points and a current of one ampere (A) results, the resistance between those points is measured in ohms. It is comparable to one volt for every ampere (V/A), to put it simply.
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Polynomial question
I don't understand this working
Why is b = d = 0 if the function is even?
Please explain the steps to solve a question like this.
To understand why b = d = 0 if the function is even, we need to consider the definition of an even function.Therefore If P(x) is an even function, then b = d = 0.
What is Polynomial?A polynomial is a mathematical expression that consists of variables and coefficients, combined using the operations of addition, subtraction, and multiplication. It can have one or more terms and can be of any degree.
An even function is a function that satisfies the condition f(x) = f(-x) for all x in the domain of the function.
If P(x) is an even function, then we have P(x) = P(-x) for all x. Substituting -x for x in the expression for P(x), we get:
P(-x) = a(-x)⁴ + b(-x)³ + c(-x)² + d(-x) + e
= a(x⁴) - b(x³) + c(x²) - d(x) + e
Since P(x) = P(-x), we can equate the two expressions for P(x) and P(-x) to get:
a(x⁴) + b(x⁴) + c(x²) + d(x) + e = a(x⁴) - b(x³) + c(x²) - d(x) + e
Simplifying this equation, we get:
2b(x³) + 2d(x) = 0
Since this equation holds for all values of x, we can set x = 0 to get:
2d(0) = 0
which implies that d = 0. Similarly, setting x = 1, we get:
2b(1³) + 2d(1) = 0
2b = 0
b = 0
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Toastmasters International cites a report by Gallup Poll that 40% of Americans fear public speaking. A student believes that less than 40% of students at her school fear public speaking. She randomly surveys 361 schoolmates and finds that 137 report they fear public speaking. Conduct a hypothesis test at the 5% level to determine if the percent at her school is less than 40%. Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)
-state the null hypothesis
-state the alternative hypothesis
- In words state what random variable P' represents
- State the distribution for the test: P'~
-what is the test statistics? z or t distribution
-What is the P value
- Explain what the P value means
- Sketch picture of the situation
- construct 95% construction interval for the true proportion
We can construct the 95% confidence interval for the true proportion. To do this, we need to calculate the margin of error, which is equal to the critical value (1.96) multiplied by the standard error (0.014). This equals 0.028.
The 95% confidence interval is then the sample proportion (0.38) plus or minus the margin of error (0.028). This is [tex](0.38 - 0.028, 0.38 + 0.028) = (0.352, 0.408).[/tex]
The test statistic in this case is the Z-statistic, as we are assuming that the underlying population is normally distributed. To conduct the hypothesis test, we must first state the null and alternative hypotheses.
Null Hypothesis (H0): The proportion of students at the school who fear public speaking is equal to or greater than 40%.
Alternative Hypothesis (H1): The proportion of students at the school who fear public speaking is less than 40%.
We must then calculate the test statistic, which is the Z-statistic in this case. To do this, we need to first calculate the sample proportion, which is the number of students who fear public speaking (137) divided by the total number of students surveyed (361). This equals 0.38. We then need to calculate the standard error of the sample proportion (SE), which is the square root of [tex](pq/n)[/tex], where p is the sample proportion (0.38) and q is the complement of the sample proportion (1-0.38 = 0.62). SE = [tex](0.38 x 0.62)/361 = 0.014.[/tex] The Z-statistic is then calculated as the difference between the sample proportion (0.38) and the population proportion (0.40) divided by the standard error [tex](0.014). Z = (0.38 – 0.40)/0.014 = -0.14.[/tex]
To conclude, we can use the Z-statistic and 95% confidence interval to test the hypothesis that the proportion of students at the school who fear public speaking is less than 40%. The Z-statistic of -0.14 falls within the critical region and the 95% confidence interval does not include 0.40, suggesting that the proportion of students at the school who fear public speaking is indeed less than 40%.
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I NEED YOUR HELP ASAP!!
To create a modified box plot for a data set, determine the outliers of the data set and the smallest and largest numbers in the data set that are not outliers. Next, determine the median of the first half of the data set, the median of the entire data set, and the median of the second half of the data set.
What are the values that are needed to create a modified box plot for this data set?
19, 15, 22, 35, 16, 22, 4, 22, 24, 16, 17, 21
Enter your answers in the blanks in order from least to greatest.
Smallest number in the data set that is not an outlier is 15, Median of the first half is 17, Median of the entire data set is 20.5. Median of the second half is 22. Largest number in the data set that is not an outlier is 35.
Give a short note on Median?
In statistics, the median is a measure of central tendency that represents the middle value in a dataset. To find the median, the data must first be sorted in ascending or descending order. If the dataset contains an odd number of values, the median is the middle value. If the dataset contains an even number of values, the median is the average of the two middle values.
The median is a useful measure of central tendency in datasets that are skewed or have outliers, as it is less sensitive to extreme values than the mean. It is also useful in datasets with non-numeric values, such as rankings or survey responses.
To create a modified box plot, we need the following values:
The smallest number in the data set that is not an outlier: 15
The median of the first half of the data set: 17
The median of the entire data set: 20.5
The median of the second half of the data set: 22
The largest number in the data set that is not an outlier: 35
So the values needed to create a modified box plot for this data set are: 15, 17, 20.5, 22, 35.
Find the value of the expression x+|x| if x≥0
Step 1: x is a positive number, so the absolute value of x will be equal to x.
Step 2: The expression x+|x| simplifies to 2x
Step 3: Therefore, the expression x+|x| = 2x if x≥0
PLEASE HELP MARKING BRAINLEIST JUST ANSWER ASAP
Answer:
3c + 19
Step-by-step explanation:
Perimeter: P = a + b + c
P = (c + 10) + (c + 6) + (c + 3) = 3c + 19
By how much percent will the area of circle will increase if the diameter increases by 40%?
The area of the circle will decrease by 51% if the diameter increases by 40%. Then the new diameter will be 1.4 times the original diameter.
Let's assume the original diameter is d and the original area of the circle is A.
Then, the new diameter will be 1.4d and the new area of the circle can be calculated as follows:
New area = pi * (New diameter/2)²= pi * (1.4d/2)² = pi * (0.7d)² = 0.49 * pi * d²
Therefore, the new area is 0.49 times the original area.
To calculate the percentage increase in area, we can use the following formula:
Percentage increase = (New value - Old value) / Old value * 100%
In this case, the old value is the original area A and the new value is the new area, which is 0.49*A. Therefore,
Percentage increase = (0.49A - A) / A * 100%
= -0.51A / A * 100%
= -51%
Therefore, the area of the circle will decrease by 51% if the diameter increases by 40%.
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In the morning 134 books were checked out from the library.in the afternoon 254 books were checked out and 188 books were checked out in the evening.how many books were checked out in the library that day?
Answer:
576 books.
Step-by-step explanation:
134+254+188=576 books in total.
Answer:
576
Step-by-step explanation:
This is literally easy!
Checked books are 134 + 254 + 188 = 576
Solve the problems. a) The number a is 4/5 of the number b. What part of number a is number b?
Answer:
Solve the problems. a) The number a is 4/5 of the number b. What part of number a is number b?
Step-by-step explanation:
a) If a is 4/5 of b, then b is 5/4 of a.
To find what part of a is b, we divide b by a:
b/a = 5/4
This means that b is 5/4 times larger than a, or b is 125% of a.
To find what part of a is b, we subtract 1 from this fraction:
b/a - 1 = 5/4 - 1
b/a - 1 = 1/4
So, b is 1/4 of a, or b is 25% of a.
5 2 fiths minus 1 2 fiths
Answer:
Step-by-step explanation:
2/5-1 2/5
Emma and Cooper went to Tico’s tacos for lunch. Emma ordered three tacos and one burrito and Cooper ordered one taco and two burritos Emmas order total was $3.65 and Cooper’s bill was $3.30. Write and solve a system of equations to model the situation above. Explain the solution in the context of this problem. Explain, or show your work in the box below.
In the given system of equations one taco costs $0.80 and one burrito costs $0.72.
What is a system of equations?An equation system is a finite collection of equations for which we searched for the common solutions. It is sometimes referred to as a set of simultaneous equations or an equation set. The classification of a system of equations is similar to that of a single equation. In modelling issues where the unknown values may be expressed in the form of variables, a system of equations finds use in everyday life.
Let us suppose the cost of one taco = x.
Let us suppose the cost of one burrito = y.
Then, for Emma we have:
3x + y = 3.65
For Cooper we have:
x + 2y = 3.30
Using elimination, multiply the first equation by 2 and subtract it from the second equation:
(2)(3x + y = 3.65)
6x + 2y = 7.30
x + 2y = 3.30
-5x = -4
x = 4/5
Substituting this value of x into either equation:
3(4/5) + y = 3.65
y = 2.15/3 ≈ 0.72
Therefore, one taco costs $0.80 and one burrito costs $0.72.
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find the smallest value of n that you can for which s n has an element of order greater than or equal to 100
The smallest value of `n` for which `S_n` has an element of order greater than or equal to 100 is 101.
To determine the smallest value of n for which S_n has an element of order greater than or equal to 100, we can use the formula
S_n = n!/r!(n - r)!,
where n is the number of elements in the set, and r is the number of elements being chosen at a time.
Given, S_n has an element of order greater than or equal to 100. The smallest value of n should be determined.
The formula for the number of permutations in a set with n elements is given by, `S_n = n!/r!(n - r)!`
where `n` is the number of elements in the set and `r` is the number of elements being chosen at a time.
The element of order `n` in `S_n` is an `n` cycle. For `n = 100`, we have an element of order 100.
This element can be expressed as `(1 2 3 ... 99 100)`. Thus, `r = 100`.
Substituting these values in the formula of S_n we get, S_n = n!/r!(n - r)! => n!/(100!(n - 100)!)
Now, we have to find the smallest value of n for which S_n has an element of order greater than or equal to 100. If we substitute `n = 100`, then we will have an element of order 100. But the question asks for the smallest value of n. So, if we substitute `n = 101`, we will have an element of order `101`. Hence, the smallest value of `n` for which `S_n` has an element of order greater than or equal to 100 is 101.
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i am a parallelogram with a longer sides 15 cm each and a shorter sides 8m each my perimeter is
Answer:
Step-by-step explanation:
= 2(15+8)
=2(23)
=46
Corey is ready to begin the process of producing his final animation. Unfortunately,
his computer does not have the power to render the final scene, so he outsources
the render to a computer that will execute the function. What method allows him to
do this?
(1 point)
O image sequences
Obatch render
O net rendering
O multi-passing
Net rendering is a method of rendering a computer-generated animation or image on multiple computers over a network.
Net rendering is a method of rendering a computer-generated animation or image on multiple computers over a network. This technique allows a user to take advantage of the computing power of multiple computers to render a scene. To do this, the user would divide the scene into several parts, assigning each part to a different computer. The computers would then render each part of the scene independently, and then the results are combined into a single image. This process can significantly reduce the time required to render a scene, as the workload is distributed over multiple computers. For example, if it would normally take a single computer 10 minutes to render a scene, net rendering could reduce that time to 2 minutes.
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Find the dimensions of the open rectangular box of maximum volume that can be made from a sheet of cardboard 19 in. by 11 in. by cutting congruent squares from the corners and folding up the sides. Then find the volume. The dimensions of box of maximum volume are __ in. (Round to the nearest hundredth as needed. Use a comma to separate answers as needed.)
The dimensions of the open rectangular box of maximum volume that can be made from a sheet of cardboard 19 in. by 11 in. by cutting congruent squares from the corners and folding up the sides are 6.33 in. x 3.33 in. x 5.33 in. The volume of the box is 113.78 in³.
How to find the dimensions of the open rectangular box of maximum volume?The dimensions of the box can be found with the following steps:
First, determine the side length of the square that is to be removed from each corner of the cardboard box. Since this will be done uniformly on all four corners, let the side length be x. The dimensions of the cardboard box can then be written as:
Length = 19 in. - 2x
Breadth = 11 in. - 2x
Height = x
After folding the cardboard along the creases, the base of the rectangular box will be (19 - 2x) in. by (11 - 2x) in. with the height of the box being x in. The volume of the box can then be found by multiplying the base and height of the box, i.e.,
Volume = (19 - 2x) (11 - 2x) x
Let V(x) be the volume of the rectangular box in terms of x. Then:
V(x) = (19 - 2x) (11 - 2x) x
Simplifying,
V(x) = 4x³ - 60x² + 209x
The maximum value of V(x) can be found by differentiating V(x) with respect to x and equating the result to zero. Therefore,
V'(x) = 12x² - 120x + 209 = 0
Solving, V(x) has a maximum value when x = 19/3 - 2(2/3)√14 or x = 19/3 + 2(2/3)√14. The value x = 19/3 - 2(2/3)√14 is the maximum value because x must be less than 5.5, which is the minimum of 11/2 and 19/2 divided by 3, the upper bound for x. Therefore, the dimensions of the box are
Length = 19 - 2(19/3 - 2(2/3)√14) = 6.33 in.
Breadth = 11 - 2(19/3 - 2(2/3)√14) = 3.33 in.
Height = 19/3 - 2(2/3)√14 = 5.33 in.
Thus, the dimensions of the box are 6.33 in. x 3.33 in. x 5.33 in. The volume of the box is:
V = 6.33 x 3.33 x 5.33 = 113.78 in³.
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Andre wrote the inequality 3x + 10 <= 30 to plan his time. Describe what x , 3x , 10 , and 30 represent in this inequality
Andre can make 6 small cranes. X is the number of small cranes, 3x is the minutes, 10 is the minute for large cranes and 30 is the total time.
3x + 10 is less than or equal to 30
3 is the minutes for the small cranes
X is the number of small cranes
10 is the minutes for the large crane
30 is the total time limit
first, subtract 10 from 30, ( 30-10) which gives you 20 so
3x is less than or equal to 20.
To figure this out, divide 20 by 3, which gives you 6 as a quotient with a remainder of two minutes.
Andre can make 6 small cranes.
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The Complete question is
Andre is making paper cranes to decorate for a party. He plans to make one large paper crane for a centrepiece and several smaller paper cranes to put around the table. It takes Andre 10 minutes to make the centrepiece and 3 minutes to make each small crane. He will only have 30 minutes to make the paper cranes once he gets home.
Andre wrote the inequality 3x + 10 ≤ 30 to plan his time. Describe what x, 3x, 10, and 30 represent in this inequality.
Solve Andre’s inequality and explain what the solution means.
Look at this series: 7, 10, 8, 11, 9, 12,. What number should come next?
A 20ft ladder is leaning against the roof of a house that is 18ft high. How far away is the ladder from the house?
Therefore, the ladder is approximately 8.72 feet away from the house.
What is Pythagoras theorem?Pythagoras' theorem is a fundamental theorem in mathematics that states that in a right-angled triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. In equation form, it can be written as:
c² = a² + b²
where c is the length of the hypotenuse, and a and b are the lengths of the other two sides of the right triangle.
Here,
We can use the Pythagorean theorem to solve this problem. Let x be the distance from the base of the ladder to the house.
In equation form, it can be written as:
c² = a² + b²
where c is the length of the hypotenuse, and a and b are the lengths of the other two sides of the right triangle.
Then we have:
x² + 18² = 20²
Simplifying and solving for x, we get:
x² = 20² - 18²
=400 - 324
= 76
x = √(76)
= 8.72 (rounded to two decimal places)
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You report a confidence interval to your boss but she says that she wants a narrower range. SELECT ALL of the ways you can reduce the width of the confidence interval. o Increase the sample size o Decrease the sample size o Increase the confidence level o Decrease the confidence level I
o ncrease the mean o Decrease the mean
We can reduce the width of the confidence interval by increasing the sample size, reducing the confidence level and decreasing the mean (A, D, and F)
What is a confidence interval?A confidence interval is an estimate of the interval that has a specified probability of including an unknown population parameter.
The purpose of a confidence interval is to estimate the true value of the population parameter being measured, such as a mean, a standard deviation, or a proportion.
In general, a wider confidence interval indicates more uncertainty about the estimate, while a narrower confidence interval suggests more precision in the estimate.
We want narrower confidence intervals to demonstrate more precision, as this allows us to draw more reliable conclusions about population parameters.
We cannot reduce the width of the confidence interval by increasing the sample size, increasing the confidence level or increasing the mean.
Thus, the correct options are a, d, and f.
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14. Two angles of a triangle measure 57º and 46°. What is the measure of the
largest exterior angle of the triangle?
Answer:
103
Step-by-step explanation:
57° + 46° =103°
This shows that the third angle in the triangle is 180°-103°=77°
Therefore the largest exterior angle is 180°-77°=103°
. Mr. Govind coaches cricket at a primary school. In order to not disturb the classes, he takes the children from the class, 6 at a time. During the 45 minutes' session, 2 children bat at a time. All children in the session get an opportunity to bat and every child bats for the same amount of time. How many minutes does each pair get to bat?
Each pair of children gets to bat for 7.5 minutes.
How to find out how much time each pair gets to bat ?To find out how much time each pair gets to bat, we need to divide the total session time by the number of pairs of children who bat.
Number of pairs of children who bat = 6 groups x 1 pair/group = 6 pairs
Total time for the session = 45 minutes
Time per pair of children who bat = Total time / Number of pairs of children who bat
= 45 minutes / 6 pairs
= 7.5 minutes per pair
Therefore, each pair of children gets to bat for 7.5 minutes.
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How much would it cost to buy a sheet of a metal 4m by 75cm which cost E90 to a metal of 5m by 2m
It would cost €27 to buy a sheet of area 4 meters by 75 centimeters.
We solve this problem easily by employing the unitary method. To answer this question, we need to first calculate the area of the metal sheet being sold and the area of the metal sheet being purchased.
The area of the metal sheet being sold is:
5 meters × 2 meters = 10 square meters
The area of the metal sheet being purchased is:
4 meters × 0.75 meters = 3 square meters
Now we can calculate the price per square meter of the metal sheet being sold:
€90 ÷ 10 square meters = €9 per square meter
Finally, we can calculate the cost of the metal sheet being purchased:
3 square meters × €9 per square meter = €27. Therefore, the cost to buy a sheet of area 4 meters by 75 centimeters which costs €90 to a metal of area 5 meters by 2 meters would be €27.
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National Collegiate Athletic Association (NCAA) statistics show
that for every 75,000 high school seniors playing basketball, about 2250 play
college basketball as first-year students. Write the ratio of the number of first-
year students playing college basketball to the number of high school seniors
playing basketball.
Answer: 100:3
Step-by-step explanation:
Answer:
the ratio of first-year college basketball players to high school seniors playing basketball is 3:100.
Step-by-step explanation:
The problem states that for every 75,000 high school seniors playing basketball, about 2,250 play college basketball as first-year students. To write the ratio of first-year college basketball players to high school seniors playing basketball, we need to compare the two quantities.
The ratio is a way of expressing the relationship between two numbers as a fraction or a pair of numbers separated by a colon (:). In this case, we want to express the ratio of the number of first-year college basketball players to the number of high school seniors playing basketball.
To write the ratio, we start by putting the number of first-year college basketball players (2,250) in the numerator of a fraction. We put the number of high school seniors playing basketball (75,000) in the denominator of the same fraction.
So the ratio can be expressed as:
2,250/75,000
To simplify this fraction, we can divide both the numerator and denominator by a common factor. In this case, both 2,250 and 75,000 are divisible by 750. Dividing both numbers by 750 gives:
2,250/75,000 = 3/100
In culinary class, you made fudge brownies and peanut butter brownies. Each batch of fudge brownies makes 1 pan. Each batch of peanut butter brownies makes 9 pans. The class made 5 batches and ended up with 29 pans. How many batches of each type of brownie were made?
Answer: 4 batches of fudge brownies and 1 batch of peanut butter brownies were made.
Step-by-step explanation:
Let x be the number of batches of fudge brownies made, and y be the number of batches of peanut butter brownies made.
From the problem, we can write two equations based on the information given:
Each batch of fudge brownies makes 1 pan: x = number of pans of fudge brownies.
Each batch of peanut butter brownies makes 9 pans: 9y = number of pans of peanut butter brownies.
We also know that the class made 5 batches in total, and ended up with 29 pans:
x + 9y = 29 (total number of pans)
We can now solve for x and y by using a system of two equations:
x + 9y = 29 (equation 1)
x + y = 5 (equation 2)
Solving for x in equation 2 and substituting into equation 1, we get:
(5 - y) + 9y = 29
Simplifying and solving for y:
8y = 24
y = 3
Substituting y = 3 into equation 2, we get:
x + 3 = 5
x = 2
Therefore, the class made 2 batches of fudge brownies (2 pans) and 1 batch of peanut butter brownies (9 pans), for a total of 29 pans. Alternatively, we can say that the class made 4 batches of fudge brownies (4 pans) and 1 batch of peanut butter brownies (9 pans) for a total of 29 pans.
help me please........................................................
Answer:
To find the area of the given figure, we can divide it into two separate shapes, a rectangle and a triangle, and then add their areas together.
First, we can find the area of the rectangle by multiplying its length and width. From the diagram, we can see that the length of the rectangle is 12 cm and the width is 5 cm.
Area of rectangle = length x width
Area of rectangle = 12 cm x 5 cm
Area of rectangle = 60 cm^2
Next, we can find the area of the triangle by using the formula for the area of a triangle, which is:
Area of triangle = 1/2 x base x height
From the diagram, we can see that the base of the triangle is 5 cm and the height is 8 cm.
Area of triangle = 1/2 x base x height
Area of triangle = 1/2 x 5 cm x 8 cm
Area of triangle = 20 cm^2
Finally, we can find the total area of the figure by adding the area of the rectangle and the area of the triangle:
Total area = area of rectangle + area of triangle
Total area = 60 cm^2 + 20 cm^2
Total area = 80 cm^2
Therefore, the area of the given figure is 80 square centimeters.
Step-by-step explanation:
Determine what number to multiply the first equation by to form opposite terms for the x-variable.
2
5
x + 6y = -10
–2x – 2y = 40
Multiplying the first equation by
will create opposite x terms
To create opposite x terms, we need to multiply the first equation by -5.
How to choose what term to multiply the first equation?
To choose what term to multiply the first equation, we need to consider the coefficients of the variable that we want to eliminate (in this case, the x variable) in both equations. Our goal is to create opposite terms for that variable in the two equations, so that when we add or subtract the equations, that variable will be eliminated.
Determining the number to multiply the first equation by to form opposite terms for the x-variable :
In this case, the coefficient of x in the first equation is 2/5, and the coefficient of x in the second equation is -2.
To create opposite terms for x, we need to find a constant that, when multiplied by the first equation, will result in a coefficient of x that is the negative of the coefficient of x in the second equation (i.e., -2).
To do this, we can divide the coefficient of x in the second equation by the coefficient of x in the first equation, and then multiply the entire first equation by the resulting constant.
In this case, we have:
[tex](-2)/(2/5) = -5[/tex]
Multiplying the first equation by -5 gives:
[tex]-5(2/5)x + (-5)6y = -5(-10)[/tex]
which simplifies to:
[tex]-2x - 30y = 50[/tex]
Now we have two equations with opposite x terms:
[tex]-2x - 4y = 40[/tex]
[tex]-2x - 30y = 50[/tex]
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Find the trigonometric ratios and the measures of the angles or the unknown lengths of these right tiangles, Round off angles to the nearest whole degree, trigonometric values to four decimal places, and lengths of sides to two decimal places.)
The value of x= 10.2.
What is trignometric ratios?This is the boundary or contour length of a 2D geometric shape.
Depending on their size, multiple shapes may have the same circumference. For example, imagine a triangle made up of wires of length L.
The same wire can be used to create a square if all sides are the same length.
The length covered by the perimeter of the shape is called the perimeter. Therefore, the units of circumference are the same as the units of length.
As we can say, the surroundings are one-dimensional. As a result, you can measure in meters, kilometers, millimeters, etc.
Inches, feet, yards, and miles are other globally recognized units of circumference measurement.
Hence, The value of x= 10.2.
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Calculator may be used to determine the final numeric value, but show all steps in solving without a calculator up to the final calculation. The surface area A and volume V of a spherical balloon are related by the equation A’ = 364V? where A is in square inches and Vis in cubic inches. If a balloon is being inflated with gas at the rate of 18 cubic inches per second, find the rate at which the surface area of the balloon is increasing at the instant the area is 153.24 square inches and the volume is 178.37 cubic inches
In the equation A’ = 364V relating the surface area A and the volume V of a spherical balloon. We are also given that the volume is increasing at a rate of 18 cubic inches per second.so the rate at which the surface area of the balloon is increasing is 6552 square inches per second
We want to find the rate at which the surface area is increasing when A = 153.24 square inches and V = 178.37 cubic inches.
To find the rate of change of A with respect to time, we can use the chain rule of differentiation:
dA/dt = dA/dV × dV/dt
We know that dV/dt = 18 cubic inches per second, so we just need to find dA/dV and then we can find dA/dt.
To find dA/dV, we differentiate the equation A’ = 364V with respect to volume V:
dA/dV = 364
Now we can find dA/dt:
dA/dt = dA/dV × dV/dt ⇒ 364 × 18 ⇒ 6552 square inches per second
So the rate at which the surface area of the balloon is increasing is 6552 square inches per second when A = 153.24 square inches and V = 178.37 cubic inches.
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Suppose f is a continuous function defined on a rectangle R=[a,b]X[c,d]. What is the geometric interpretation of the double integral over R of f(X,y) if f(X,y)>0
If f(x,y) > 0 and is a continuous function defined over a rectangle R=[a,b]x[c,d], then the double integral over R of f(x,y) can be interpreted as the volume of a solid that lies in the first octant and under the graph of the function f(x,y) over the region R.
The geometric interpretation of the double integral over R of f(x,y) if f(x,y) > 0, where f is a continuous function defined on a rectangle R = [a,b] × [c,d] is given as follows:
The double integral of f(x,y) over R, if f(x,y) > 0, gives the volume under the graph of the function f(x,y) over the region R in the first octant.
Consider a point P (x, y, z) on the graph of f(x, y) that is over the region R, and let us say that z = f(x,y). If f(x,y) > 0, then P is in the first octant (i.e. all its coordinates are positive).
As a result, the volume of the solid that lies under the graph of f(x,y) over the region R in the first octant can be found by integrating the function f(x,y) over the rectangle R in the xy-plane, which yields the double integral.
The following formula represents the double integral over R of f(x,y) if f(x,y) > 0:
∬Rf(x,y)dydx
The geometric interpretation of the double integral over R of f(x,y) if f(x,y) > 0 is given by the volume of the solid that lies under the graph of the function f(x,y) over the region R in the first octant.
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The shedding frequency based on the analysis of Question 3 is to be determined through the use of a small-scale model to be tested in a water tunnel. For the specific bridge structure of interest D=20 cm and H=300 cm, and the wind speed V is 25 m/s. Assume the air is at MSL ISA conditions. For the model, assume that Dm =2 cm. (a) Determine the length of the model Hm needed for geometric scaling. (b) Determine the flow velocity Vm needed for Reynolds number scaling. (c) If the shedding frequency for the model is found to be 27 Hz, what is the corresponding frequency for the full-scale structural component of the bridge? Notes: Refer to the eBook for the properties of air. Assume the density of water
rhoH2O = 1000 kg/m3 and the dynamic viscosity of water μH2O =1×10^−3 kg/m/s
Answer:
Step-by-step explanation: