kiran collects data about the number of trees on school property and the average standardized test scores for those schools koran says the scatter plot between the number of trees on. school property and student standardized test scores shows a strong and positive correlation an increase in the number of trees on school property cause the students to score better on standardized test . what does it mean for the relationship between the variables when the correlation is strong in this situation
Answer:
Although the variables are related, there is not likely a causal relationship. Trees probably do not directly influence test scores as much as other factors that might be related.
Step-by-step explanation:
divide 6 by b, then double the result
Answer:
it is 12/2b
Step-by-step explanation:
answeranswer
Select the correct answer from each drop-down menu. circle a has diameters ef and ih intersecting approximately at 90 degrees, radius ad with point d lies on minor arc hf, and chord bc intersecting diameter ef near point e at a right angle. point a is the center of this circle. the ratio of the lengths of and is 2 : 1.
Answer:EF to AD
Step-by-step explanation:
Evaluate 7 Σ n=1 2(-2)^n-1.
Answer:
86
Step-by-step explanation:
I assume the question is [tex] \sum_{n=1}^{7} 2(-2)^{n-1} [/tex]
7: 2(-2)^6 = 128
6: 2(-2)^5 = -64
5: 2(-2)^4 = 32
4: 2(-2)^3 = -16
3: 2(-2)^2 = 8
2: 2(-2)^1 = -4
1: 2(-2)^0 = 2
128 - 64 + 32 - 16 + 8 - 4 + 2 = 86
Find an equation that fits this question please
y = [tex]\frac{3}{4} x[/tex] is the relationship between two variables x and y.
What is a direct variation relationship?The relationship between two variables in which one is a constant multiple of the other is referred to as direct variation. For instance, two variables are said to be in proportion when one affects the other. b = ka is the equation if b is directly proportional to a. (where k is a constant).When one variable changes and the second variable varies proportionally while the ratio of the second variable to the first variable stays constant, the relationship is said to have direct variation. For instance, there is a constant, k, which is the ratio of y:x when y varies directly as x.from the Table x and y in the ratio 4 : 3
i. e
The equation related to x and y is :
y = [tex]\frac{3}{4} x[/tex].
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What is the value of x?
Write a recursive formula for an, the nth term of the sequence 2,-6,18,-54
Answer: The recursive formula for the sequence 2, -6, 18, -54 is given by the following:
a(n) = (-3) * a(n-1)
where a(n) is the nth term of the sequence and a(n-1) is the previous term in the sequence.
This means that each term in the sequence is equal to -3 times the previous term, with the first term being 2. For example, the third term of the sequence (a(3)) would be equal to (-3) * a(2), which is (-3) * (-6) = 18. The fourth term of the sequence (a(4)) would be equal to (-3) * a(3), which is (-3) * 18 = -54. And so on.
This recursive formula can be used to calculate the nth term of the sequence for any value of n.
Which is an equation of a line that passes through the point (-1, -4 and has an undefined slope?
12.098x+10996=136x+89
The value of x in the equation is 88.03.
How to solve an equation?An equation is a mathematical statement with an 'equal to' symbol between two expressions that have equal values.
Therefore, the equation be solve as follows:
The variable x can be solved as follows:
A variable is a number represented with letter in an equation.
Hence,
12.098x + 10996 = 136x + 89
subtract 12.098x from both sides
12.098x - 12.098x + 10996 = 136x - 12.098x + 89
10996 = 123.902x + 89
subtract 89 from both sides of the equation
10996 - 89 = 123.902x + 89 - 89
10907 = 123.902x
divide both sides by 123.902
Hence,
x = 10907 / 123.902
x = 88.0292489225
x = 88.03
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Out of the salary of Rs.123456, I saved half of it. From the remaining money, I spend 47% on food and 18% on rent. Calculate the amount spent on food and house rent?
Answer:
Amount spend on food: Rs 29012.16
Amount spend on rent: Rs 11111.04
Step-by-step explanation:
We know
The salary is Rs.123456
You saved half of it
123456/2 = Rs 61728
So, you have Rs 61728 remaining
47% on food
47% = 0.47
61728 times 0.47 = Rs 29012.16
So, you spend Rs 29012.16 on food
18% on rent
18% = 0.18
61728 times 0.18 = Rs 11111.04
So, you spend Rs 11111.04 on rent
So,
Amount spend on food: Rs 29012.16
Amount spend on rent: Rs 11111.04
you have a rectangular piece of wood that is 16 in by 8 in. a small length, x, is cut from each of the 4 sides yielding a surface area of 48 2 in . find the value of x.
After solving the equation, the value obtained for x will be equal to 20 in².
What is the area?An object's area is how much space it takes up in two dimensions. It is the measurement of the number of unit squares that completely encompass the surface of a compact figure.
The squared unit, which is frequently expressed as inches, square feet, etc., is the accepted unit of area.
As per the given information in the question,
Let the length of the rectangular wood, l = 16 in and,
The width of the rectangular wood, w = 8 in.
Use the area of a rectangle,
A = lw
A = (16)(8)
A = 128 in².
Let the area cut from each side be x.
If the area is cutting from all sides, then it will be 4x.
The surface area left after cutting the board = 48 in²
Then, the equation will be,
128 in² - 4x = 48 in²
4x = 128 in² - 48 in²
4x = 80
x = 80/4
x = 20 in²
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Form 100 points what is 100+100-100+800-69=
Answer:
Hi!
I think the answer is 831
I hope this helped you :)
Answer:
831
Step-by-step explanation:
Find the inverse of the following function. f(x) 8√ x for x > 0
Inverse function of f(x) 8√ x for x > 0 is f^-1(y)is 8√y for y > 0. The inverse of a function is a function that "undoes" the original function.
What is inverse of a function?In order for a function to have an inverse, it must be one-to-one, meaning that each input value must correspond to a.
if the original function maps input values to output values, the inverse function maps the output values back to the input values.
To find the inverse of the function f(x) = 8√x for x > 0, we can use the following steps:
Replace f(x) with y. This gives us y = 8√x for x > 0.
Replace x with f^-1(y). This gives us f^-1(y) = 8√y.
Solve for y. To solve for y, we can square both sides of the equation:
y^2 = (8√y)^2
y^2 = 64y
y^2 - 64y = 0
y(y - 64) = 0
This equation has two solutions: y = 0 or y = 64. However, the original function is only defined for x > 0, so the inverse function is only defined for y > 0. This means that the inverse function is f^-1(y) = 8√y for y > 0.
Therefore, the inverse of the function f(x) = 8√x for x > 0 is f^-1(y) = 8√y for y > 0.
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Graph this compound inequality: x <-8 or x ≥ 3
The graph of the inequalities x < -8 and x ≥ 3 would be the lines right to 3 in the number line which also includes 3 and the line left to -8 but -8 not included.
What is Number line?Number lines are the graphical representation of numbers on a horizontal straight line where the numbers are placed on equal intervals. We can graph the equations and inequalities of one variable on a number line.
The given inequalities are x < -8 and x ≥ 3.
First let us consider the inequality x < -8.
This means that all the numbers which is less than -8 but does not include -8.
That will be a line tends to left from -8 with an open circle on -8.
Consider the other inequality x ≥ 3.
This includes all the numbers which are greater than 3 and also include the number 3 since the inequality is ≥.
The graph will be a line tends to right from 3 with a closed circle on 3.
Hence the graph of this compound inequality will be a line tends to left with an open circle on -8 and a line tends to right with a closed circle on 3.
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Answer: i did it
Step-by-step explanation: answered the 2nd question aswell, hope this helps someone
A popular fast-food restaurant serves cheeseburgers and fries. A family meal consists of 3 cheeseburgers and 4 orders of fries for a total of 3650 calories. A deluxe family meal consists of 5 cheeseburgers and 6 orders of fries for a total of 5750 calories.
Answer:
Calories per Cheeseburger: 1250
Calories per Fries: 250
Step-by-step explanation:
11-14) if b to the power x, = 7 and b > 0, then 7 / b must equal which of the following:
a) b to power (x-1)
b) b to power (x+1)
c) 7 to power x
Answer:
Here is the answer
Step-by-step explanation:
If b to the power x is equal to 7 and b is a positive number, then 7 / b must equal b to the power (x-1).
We can see this by applying the definition of an exponent: b to the power x is equal to b multiplied by itself x times. For example, if b is 2 and x is 3, then 2 to the power 3 is equal to 2 * 2 * 2 = 8.
If we divide both sides of this equation by b, we get:
7 / b = (b * b * ... * b) / b = b * b * ... * b = b to the power (x-1)
Therefore, if b to the power x is equal to 7 and b is a positive number, then 7 / b must equal b to the power (x-1). The answer is therefore a) b to the power (x-1).
a plant cell had 5.8 x 10^-6 m and width 2.9 x 10^-6 m. what is the ratio of the plants cells length to its width
The ratio of the plant cell's length to its width is 2:1 (5.8 x 10^-6 m to 2.9 x 10^-6 m).
To calculate the ratio of the plant cell's length to its width, we first need to find the length and width of the cell. The given data states that the length of the cell is 5.8 x 10^-6 m and the width is 2.9 x 10^-6 m. To calculate the ratio, we divide the length by the width. In this example, we divide 5.8 x 10^-6 m by 2.9 x 10^-6 m, which equals 2. Thus, the ratio of the plant cell's length to its width is 2:1.
length / width = 5.8 x 10^-6 m / 2.9 x 10^-6 m = 2
length : width = 5.8 x 10^-6 m : 2.9 x 10^-6 m = 2:1
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with an is + Un object is thrown vertically upward from a height of hift. initial speed of Vof +/sec It's height h (in feet) after + seconds is given by h = -16+² + vot h Given this, if it thrown vertically upward from the ground with an initial speed of: A, 64 Ful sec.A) it what time will the height of the object be Is F₁ (two answers) B, how long will it take for the object to reach 63 f1
The time to reach 15 feet is 3.75 seconds and the times to reach 63 feet are 1.75 and 2.25 seconds
Time to reach 15 feetFrom the question, we have the following parameters that can be used in our computation:
h= -16t² + v₀t + h₀
Also, we have
v₀ = 64
h₀ = 0
So, the function becomes
h= -16t² + 64t
At a height of 15 feet, we have
-16t² + 64t = 15
So, we have
-16t² + 64t - 15 = 0
Factorize the equation
So, we have the following representation
(4t - 1)(4t - 15) = 0
Expand the equation
4t - 1 = 0 or 4t - 15 = 0
So, we have
4t = 1 or 4t = 15
This gives
t = 1/4 or t = 15/4
Express as decimals
t = 0.15 or t = 3.75
Time to reach 63 feetHere, we have
h= -16t² + v₀t + h₀
Also, we have
v₀ = 64
h₀ = 0
So, the function becomes
h= -16t² + 64t
At a height of 63 feet, we have
-16t² + 64t = 63
So, we have
-16t² + 64t - 63 = 0
Factorize the equation
So, we have the following representation
(4t - 7)(4t - 9) = 0
Expand the equation
4t - 7 = 0 or 4t - 9 = 0
So, we have
4t = 7 or 4t = 9
This gives
t = 7/4 or t = 9/4
Express as decimals
t = 1.75 and t = 2.25
Hence, the time is 2.25 seconds
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Complete question
An object is thrown vertically upward from a height of h₀ ft with an initial speed of v₀ ft/sec. Its height h (in feet) after t seconds is given by
h= -16t² + v₀t + h₀. Given this, if it is thrown vertically upward from the ground with an initial speed of 64 ft/sec,
(a) At what time will the height of the ball be 15 ft? (two answers)
(b) How long will it take for the ball to reach 63 ft?
find the slope of the line that passes through (8,10) and (10,7)
Answer:
slope = - [tex]\frac{3}{2}[/tex]
Step-by-step explanation:
calculate the slope m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (8, 10 ) and (x₂, y₂ ) = (10, 7 )
m = [tex]\frac{7-10}{10-8}[/tex] = [tex]\frac{-3}{2}[/tex] = - [tex]\frac{3}{2}[/tex]
What is the solution to (x – 5)(x 2)(x – 7) < 0? a number line going from negative 8 to 8. open circles are at negative 2, 5, and 7. the line is shaded to the left of negative 2 and between 5 and 7. a number line going from negative 8 to 8. open circles are at negative 2, 5, and 7. the line is shaded between negative 2 and 5 and to the right of 7. a number line going from negative 8 to 8. closed circles are at negative 2, 5, and 7. the line is shaded to the left of negative 2 and between 5 and 7. a number line going from negative 8 to 8. an open circle is at 5, and closed circles are at negative 2 and 7. the line is shaded between negative 2 and 5, and to the right of 7.
Answer:
Step-by-step explanation:
The solution is attached to this message.
Answer:
A
Step-by-step explanation:
A user: riyadh65 included the correct answer
Find the slope and the y-intercept.
Then use them to graph the line. -2x + 5y = -15
Answer:
Step-by-step explanation:
this is easy
PLEASE EXPLAIN AND SHOW YOUR WORK THANK YOU!!
Solve as a MIXED NUMBER:
-2.25 + 0.4x = -2.8
THANK YOU!
Answer:
-1 3/8
Step-by-step explanation:
-2.25 + 0.4x = -2.8
-2.25 + 2.25 + 0.4x = -2.8 + 2.25 ==> add 2.25 on both sides to isolate x
0.4x = -0.55
(0.4x = -0.55)*20 ==> multiply the equation by 20 to remove decimals
8x = -11
x=-11/8
x=-(3+8)/8 ==> turn x into a mixed number
x=-3/8 - 8/8
x=-3/8 - 1 ==> simplify
x=-1 - 3/8
x=-(1 + 3/8)
x=-1 3/8
Write the answer in the blank.
What number is 280 more than 220?
Answer: 500
Step-by-step explanation:
280 + 220 is 500
Answer:
The number is 500.
Step-by-step explanation:
Let's assume that,
→ Missing number = x
Forming the equation,
→ x = 220 + 280
Now the value of x will be,
→ x = 220 + 280
→ [ x = 500 ]
Hence, the number is 500.
if two vectors are perpendicular to each other, their cross product must be zero.
true
false
Answer: False
Step-by-step explanation: This is false because perpendicular mean that 2 lines cross to make a 90 degree angle. If a cross product is 0 the lines never touch meaning its parallel.
4
Lee has 6 pygmy goats. Their weights, in kg, are listed below.
32 23 31 28 36
26
Two of the goats wander off and don't return. The remaining 4 goats have a mean
weight of 27.25 kg. Find the weights of the two goats who wandered off.
4
GR
Answer:
The weight of the two goats is 2.08 kg
Step-by-step explanation:
Total avg
32+23+31+28+36+26 = 176176/6 = 29. 33Avg of the two goats
29.33 - 27.25 = 2.08 kgAvg of one goat
2.08 /2 = 1.04 The avg of one goat 1.04kgHelp i am confused
I don't know what this is
HELP ASAP
will mark brainllest if its the best answer.
Answer:
Below
Step-by-step explanation:
First one and third one and 4th one are true
or each table find if the y/x is a constant number or fraction Hints : A 6/2, 12/4, 18/6 and 24/8 all reduce to 3/1 so all are the same and all are good. B 5/8, 10/16, 15/24, 20/32 all reduce to 5/8 and all are the same so good. C 9/10, 10/11, 11/12, 12/13 none are the same so no D 0, 1, 9/3, 25/5 not the same so no
Answer:
"15" (and any subsequent words) was ignored because we limit queries to 32 words
If three hens can lay 3 eggs in 3 days how many days can 7 hens lay 7 eggs? Pls help!!
Answer:
3 days
Step-by-step explanation:
regression analysis invites us to think in terms of an independent variable resulting from or being caused by a dependent variable's actions. true false
The given statement , regression analysis invites us to think in terms of an independent variable resulting from or being caused by a dependent variable's actions is true.
Regression analysis is a group of statistical procedures used in statistical modelling to determine the relationships between a dependent variable (often referred to as the "outcome" or "response" variable, or a "label" in machine learning jargon), and one or more independent variables (often referred to as "predictors," "covariates," "explanatory variables," or "features").
In linear regression, the most typical type of regression analysis, the line (or a more complicated linear combination) that most closely matches the data in terms of a given mathematical criterion is found.
When using the ordinary least squares method, for instance, the specific line (or hyperplane) that minimizes the sum of squared differences between the genuine data and that line is computed (or hyperplane).
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a tank with a capacity of 400 l is full of a mixture of water and sugar with the concentration 0.05 g/l. in order to reduce the concentration of sugar, fresh water is pumped into the tank at a rate of 4 l/s. the mixture is kept stirred and is pumped out at a rate of 10 l/s. find the amount of sugar in the tank as a function of time.
The function for the tank's sugar content as a function of time is y(t) = (20/(400)^5/3 (400-6t)^5/3.
Time functions include the following: s(t) is the distance that a particle travels from time 0 to time t. v(t) is the particle's velocity at the given time. a(t) is the acceleration of a particle at time t. To add the specified amount of hours, we can utilize the TIME function. The function eliminates the requirement for us to keep in mind the formula to convert decimal hours to an Excel time. The correct formula is =A2+TIME (B2,0,0).
Let y(t) = amt. of Cl at time t.
At time t = 0, there is (400 L) (0.05 g L) = 20 g of Cl in the tank, so the initial condition is y(0) = 20.
To set up our differential equation, we consider the rate at which Cl flows into the tank and the rate at which Cl flows out of the tank.
dy/dt = (rate of Cl in) − (rate of Cl out) =
dy/dt = 0-(y/400-6t)*(10)
dy/dt = (−10y/(400 − 6t))
Thus, the particular solution that gives the amount of Cl at time t is
y(t) = (20 / (400)^5/3) (400 − 6t)^5/3
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