Answer:
2.5 years
Step-by-step explanation:
Will Mark Brainlest help step by step. (The ratio of two men present age is 3:4 and this will be 7:9 after 4 years what are their present age)
Answer:
24 and 32
Step-by-step explanation:
Let their present ages be x and y
Therefore, x
[tex] \frac{x}{y} = \frac{3}{4} [/tex]
we have 4x = 3y
4x - 3y = 0......................(I)
After four years,
[tex] \frac{x + 4}{y + 4} = \frac{7}{9} [/tex]
we have, 9(x + 4) = 7(y + 4)
9x + 36 = 7y + 28
9x - 7y = -8 ........................(ii)
Solving (I) and (ii) simultaneously
4x - 3y = 0
9x - 7y = -8
multiply eqn I by 9 and equation (ii) by 4 and subtract result
36x - 27y = 0...............(iii)
36x - 28y = -32...........(iv)
subtracting (iv) from (iii) we have,
y = 32
substituting y back in equation (I)
4x - 3y = 0
4x -3(32) = 0
4x - 96 = 0
4x = 96
x = 24
Their ages are 24 and 32
Simply the following 5 1/3 -7 5/6 + 6 1/4
Answer:
[tex]3 \frac{3}{4}\\[/tex] / 3.75
Step-by-step explanation:
Step 1: Make all the mixed numbers, improper fractions:
[tex]5 \frac{1}{3} = \frac{16}{3}[/tex]
[tex]7\frac{5}{6} = \frac{47}{6}[/tex]
[tex]6\frac{1}{4} =\frac{25}{4}[/tex]
In order to add/subtract fractions, they must all have a common denominator, the smallest common denominator for all these fractions is 12. And so in order to make 12 the denominator, we must now multiply all the fractions by their multiple.
[tex]\frac{16}{3} = \frac{64}{12}[/tex]
[tex]\frac{47}{6} = \frac{94}{12}[/tex]
[tex]\frac{25}{4} = \frac{75}{12}[/tex]
Time to solve:
[tex]\frac{64}{12} -\frac{94}{12} + \frac{75}{12} =[/tex]
[tex]\frac{-30}{12} + \frac{75}{12} =[/tex]
[tex]\frac{45}{12}[/tex]
Simplify:
[tex]\frac{45}{12} = \frac{15}{4}[/tex]
Convert to a mixed number:
[tex]3 \frac{3}{4}[/tex]
Hope this helps!
Which equation represents the slope-intercept form of the line below?
.
y-intercept = (0, 2)
slope = -
O A. y=-x-2
O B. y=-3x+2
C. y=2x-3
Answer:
B
Step-by-step explanation:
Let me know if you need a detailed explanation.
Hope this helps!
Can someone please help? U get points just from typing and I would really appreciate it.
The sum of two consecutive numbers is 131. What are the two numbers?
A. 64 and 65
B. 64 and 67
C. 65 and 66
D. 130 and 131
No links or fake answers pls. Thank you for understanding.
Answer:
C
Step-by-step explanation:
Consecutive numbers are directly next to each other on the number line, so B is already out of the question. Add each pair together to see which one is 131.
Answer:
C. 65 and 66
Step-by-step explanation:
Let x be first number
Then x + 1 be next number
x + (x + 1) = 131
2x + 1 = 131
2x = 130
x = 65
x + 1 = 66
please help lollllllllllllllllllll
Answer:
A. 12.21
Step-by-step explanation:
Define and explain:
This a right triangle, so the Pythagorean Theorem applies. The Pythagorean Theorem states that the sum of the squared legs is equal to the squared hypotenuse.
The legs of a triangle are the sides that form the right angle.
The hypotenuse is the longest side.
Formula:
[tex]a^2+b^2=c^2[/tex]
[tex]a,b-legs[/tex]
[tex]c-legs[/tex]
Here, I am solving for the hypotenuse.
[tex]7^2+10^2=c^2[/tex]
[tex]49+100=c^2[/tex]
[tex]149=c^2[/tex]
The last step is to find the square root of 149.
The square root of 149 is irrational, of course, so I must round the square root to the nearest hundredth.
[tex]12.2065556157[/tex] ≈ [tex]12.21.[/tex]
[tex]12.21=c[/tex]
Conclude:
I, therefore, believe the length of the hypotenuse is 12.21.
A theater is selling movie tickets. The first night, 19 Senior tickets and 57 Adult tickets were sold. The second night, 20 Senior tickets and 62 Adult tickets were sold. On which night did the theater sell a higher ratio of Senior tickets to Adult tickets
Answer:
The theater sold a higher ratio of Senior tickets to Adult tickets on the first night.
Step-by-step explanation:
Rate of senior tickets to adult tickets:
Can also be interpreted as the percentage of senior tickets, out of the number of total tickets, which is the number of senior tickets multiplied by 100% and divided by the number of total tickets.
The first night, 19 Senior tickets and 57 Adult tickets were sold.
19 out of 19 + 57 = 76. So
19*100%/76 = 25%
The second night, 20 Senior tickets and 62 Adult tickets were sold.
20 out of 20 + 62 = 82. So
20*100%/82 = 24.39%
25% > 24.39%, so the theater sold a higher ratio of Senior tickets to Adult tickets on the first night.
PLEASE HELP!!!
WILL MARK BRAINLIEST!!!
Solve for x.
MULTIPLE CHOICE!
THANK YOU!
Answer: 3 I think
Step-by-step explanation:
f(x)=2x^2+3x^2-7x+2 g(x)=2x-5
Find (f+g)(x)
Answer:
[tex](f+g)(x) = 5x^2 -5x - 3[/tex]
Step-by-step explanation:
[tex]f(x) = 2x^2 + 3x^2 -7x + 2 = 5x^2 -7x + 2\\\\g(x) = 2x - 5\\\\(f + g)(x) = f(x) + g(x) \\[/tex]
[tex]= (5x^2 - 7x + 2 ) + ( 2x - 5)\\\\= 5x^2 - 7x + 2x + 2 - 5\\\\= 5x^2 -5x - 3[/tex]
. If 2n - 5m + 10 = 0, find
i) m, when n=2 ii) n, when m=5
Answer:
when n = 2; m = 2 [tex]\frac{4}{5}[/tex]
when m=5; n = [tex]7\frac{1}{2}[/tex]
Step-by-step explanation:
2n - 5m + 10 = 0
-10 -10
2n - 5m = -10
2(2) - 5m = -10
4 - 5m = -10
-4 -4
-5m = -14
-5 -5
m = 2 [tex]\frac{4}{5}[/tex]
2n - 5(5) = -10
2n - 25 = -10
+25 +25
2n = 15
2 2
n = [tex]7\frac{1}{2}[/tex]
Alex found a new fruit punch recipe that calls for cranberry juice and lemon-lime soda. If cranberry juice costs $3.60 per bottle and lemon-lime soda costs $1.40 per bottle and the recipe calls for 2 times as many bottles of lemon-lime soda as cranberry juice, at most how many bottles of cranberry juice can he buy if he only has $38.40
Answer:
Alex can buy 12 bottles of lemon-lime soda and 6 bottles of cranberry juice.
Step-by-step explanation:
Since Alex found a new fruit punch recipe that calls for cranberry juice and lemon-lime soda, if cranberry juice costs $ 3.60 per bottle and lemon-lime soda costs $ 1.40 per bottle and the recipe calls for 2 times as many bottles of lemon-lime soda as cranberry juice, to determine at most how many bottles of cranberry juice can he buy if he only has $ 38.40 the following calculation must be performed:
20 x 1.40 + 10 x 3.60 = 64
10 x 1.40 + 5 x 3.60 = 32
12 x 1.40 + 6 x 3.60 = 38.40
Therefore, Alex can buy 12 bottles of lemon-lime soda and 6 bottles of cranberry juice.
Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)f(x)=36x−2x^2
Answer:
[tex]x =9[/tex] --- the critical point
Step-by-step explanation:
Given
[tex]f(x) =36x -2x^2[/tex]
Required
Determine the critical numbers
First, we differentiate f(x)
[tex]f'(x) = 36 - 4x[/tex]
Set to 0 and solve for x
[tex]36 -4x = 0[/tex]
Make 4x the subject
[tex]4x = 36[/tex]
Solve for x
[tex]x =36/4[/tex]
[tex]x =9[/tex]
4^x=39
Need help as soon as possible
Answer:
X =9.75
correct me y'all if am wrong ❤️
Answer:
x= 2,6427...
used computer
To rent a car, Cesar must pay $15 a day plus 5 cents for every mile he drives. In dollars, what is his final bill if he rents a car for 3 days and drives a total of 50 miles?
Answer:
$70
Step-by-step explanation:
What we know:
⇒ He must pay 15 dollars a day
⇒ He needs to pay an additional 5 cent for every mile he drives
⇒ He drives 50 miles for 3 days
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Since he pays $15 a day and he is driving this car for 3 days, we have to multiply 15 by 3.
15*3=45
He drove 50 miles and each mile is 5 cents so we have to multiply those as well.
50*.5=25
Now we add both the sums togather~
25+45= $70
∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞The amount he has to spend for his car rental is $275.
find the number of terms in an AP given that it's first and last terms are a & 37a respectively and it's common difference is 4a
Answer:
Substitute the values give into the nth term of the arithmetic progression and solve this the steps are give above in the picture
How would you classify the number 121?
A. Perfect square
B. Perfect cube
C. Both a perfect square and a perfect cube
D. Neither a perfect square nor a perfect cube
A . Perfect square
Step-by-step explanation:
This is your answer
Hope this helps you :)
Answer: B- Perfect cube
Step-by-step explanation: I am smort
Given that there were 4 Heads in the first 7 tosses, find the probability that the 2nd Heads occurred at the 4th toss. Give a numerical answer.
Answer:
The probability that the 2nd Heads occurred at the 4th toss is 5.99%.
Step-by-step explanation:
Given that there were 4 Heads in the first 7 tosses, to find the probability that the 2nd Heads occurred at the 4th toss the following calculation must be performed:
7 - 4 = 3
4/7 x 3/7 x 3/7 x 4/7 = X
0.571 x 0.428 x 0.428 x 0.571 = X
0.0599 = X
Therefore, the probability that the 2nd Heads occurred at the 4th toss is 5.99%.
what is the area of Ghana?
Answer:
its 238,535km²
Step-by-step explanation:
i hope it helps alot
What is the area of Ghana?
ඞ Ghana covers an area of [tex]\sf\purple{238,535\: km²}[/tex].
[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}[/tex]
Xavier, Yi, and Zazoo decide to share their lottery winnings of £11000 such that Yi has three times as much as Zazoo and Xavier has half of Yi’s winnings. How much should each receive?
Answer:
2000 ; 6000 ; 3000
Step-by-step explanation:
Given:
Total lottery winning = £11,000
Let :
Zazoo's share = x
Yi's share = 3x
Xavier's share = 3/2x
Total share = (x + 3x + 3/2x) = 5.5x
Total winning / total share
x = £11000 / 5.5
= 2000
Zazoo's share = £2000
Yi's share (2000 * 3) = £6000
Xavier's share = 3/2 * 2000 = £3000
Graph the solution to the following linear inequality in the coordinate plane. 5 x - y > -3
Given:
The inequality is:
[tex]5x-y>-3[/tex]
To find:
The graph for the given linear inequality in the coordinate plane.
Solution:
We have,
[tex]5x-y>-3[/tex]
The related equation for this inequality is:
[tex]5x-y=-3[/tex]
The table of values is:
x y
0 3
-1 -2
Plot the points (0,3) and (-1,-2) on a coordinate plane and connect them by a dotted straight line because the sign of inequality is >.
Check the given inequality for (0,0).
[tex]5(0)-(0)>-3[/tex]
[tex]0>-3[/tex]
This statement is true. So, the shaded area of the given inequality is towards the origin.
Therefore, the required graph is shown below.
You are studying the color patterns of a species of iris that can be yellow, purple, or red. If you are performing a chi-squared test to compare the number of each you find in a field to the number you would expect to find based on the pollinators in the area, how many degrees of freedom would you have in your analysis
Answer:
Number of degrees of freedom = 2
Step-by-step explanation:
The degree of freedom in such type of chi-Square test depend on the number of phenotypes of the a particular species produced in a given cross.
Here the total phenotype number is three i.e yellow, purple, or red
Hence, the number of degrees of freedom = total number of phenotype - 1
Number of degrees of freedom = total number of phenotype - 1
Number of degrees of freedom = 3-1
Number of degrees of freedom = 2
In a right triangle, angle C measures 40°. The hypotenuse of the triangle is 10 inches long. What is the approximate length of the side adjacent to angle C?
6.4 inches
7.7 inches
8.4 inches
13.1 inches
Answer:
The cosine function is: adjacent/hypotenuse = cos (40). We know the hypotenuse length is 10, so the equation is now adjacent/10 = cos (40). Solving for adjacent length we get 7.7 inches.
Answer:
the answer is B: 7.7 inches
Step-by-step explanation:
did the test go 100%
Jane, Shen, and Chris sent a total of 152 text messages during the weekend. Shen sent 4 times as many messages as Chris. Jane sent 8 more messages than
Chris. How many messages did they each send?
Answer:
Chris=24
Jane=32
Shen=96
Step-by-step explanation:
Chris= x
Jane = x + 8
Shen = 4x
6x+8= 152
152-8=144
6x=144
144/6=24
x=24
Which of the following is equal to the ratio 5cm:5m:0.02km?
A. 10: 400 C. 1: 100: 400
B. 300:2000 D. 10: 500
Answer:
Its C. When you are getting ratios, we need to convert the units too...
The correct ratio which is equal to the ratio 5cm:5m:0.02km is,
⇒ 1 : 100 : 400
What is mean by Ratio?A ratio indicates how many times one number contain in another number. The ratio of two number is written as x : y, which is equivalent to x/y.
Where, x and y are individual amount of two quantities.
And, Total quantity gives after combine as x + y.
We have to given that;
The ratio is,
⇒ 5cm:5m:0.02km
Now, We can simplify the ratio as;
⇒ 5 cm : 5 m : 0.02 km
⇒ 5 cm : 5 x 100 cm : 0.02 x 100000
⇒ 5 cm : 500 cm : 2000 cm
⇒ 1 : 100 : 400
Thus, The correct ratio which is equal to the ratio 5cm:5m:0.02km is,
⇒ 1 : 100 : 400
Learn more about the ratio visit:
https://brainly.com/question/12024093
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Use the formula for the sum of the first n integers either to evaluate the sum or to express it in closed form.
a. 9 + 10 + 11 + 12 + .........+ 400
b. 9 + 10 + 11 + 12 +......... + k
Answer:
A) 80,164
B) S_n = (n/2)(17 + n)
Step-by-step explanation:
A) Formula for the nth term of an arithmetic progression series is;
a_n = a + (n - 1)d
a is first term of the series and in this case it is 9.
Difference is d which is 1 since they are consecutive integers.
Thus, For the last term which is 400, we have;
400 = 9 + (n - 1)1
400 - 9 = n - 1
391 = n - 1
n = 391 + 1
n = 392
Thus,there 392 terms in this sequence.
Formula for sum of an AP is;
S_n = (n/2)(2a + (n - 1)d)
S_392 = (392/2)((2 × 9) + (392 - 1)1)
S_392 = 80,164
B) The last term here is k, so we can't know exactly how many terms are in this sequence. Thus, let the number of terms be n.
Now, as above,
a = 9
d = 1
Sum of this AP sequence is;
S_n = (n/2)((2 × 9) + (n - 1)1)
S_n = (n/2)(18 + n - 1)
S_n = (n/2)(17 + n)
help me with this please
Answer:
the numbers that right of the origin on the x axis are positive numbers
Answer:
positive
Step-by-step explanation:
positive runs on the right of x -axis
negative runs on the left of the x-axis
prime and odd will never be running on either side of x-axis
hope it helps!!!!!!
) So if you buy 3 combo meals that each come with 2 tacos and one drink, how much do you have altogether?
Answer:
7
Step-by-step explanation:
3 combos
2 tacos
1 drink
3 combos × 2 taco = 6
6 is for the combos and tacos.
6 + 1 drink = 7
they have 7 altogether
PLS HELP! If f(x) = 3x2 – 2x – 11, what is the value of f(-3)?
9514 1404 393
Answer:
22
Step-by-step explanation:
Put -3 where x is and do the arithmetic.
f(-3) = 3(-3)² -2(-3) -11 = 27 +6 -11
f(-3) = 22
_____
Additional comment
Sometimes evaluation is easier if you rewrite the polynomial in Horner form:
f(x) = (3x -2)x -11
f(-3) = (3(-3) -2)(-3) -11 = -11(-3) -11 = 33 -11 = 22
Answer to the question
Answer:
x = 4Step-by-step explanation:
102 + 102 + 24x + 24x - 18 - 18 = 360
204 + 48x - 36 = 360
204 + 48x = 360 + 36
204 + 48x = 396
48x = 396 - 204
48x = 192
x = 192/48
x = 4
Answer:
x = 4. . . .. . . . ... . . . .
. .. . . .. . .
cho hệ các vector
U = − − + − {(1,2, ); (2,3, 1);(1,0,2 n n n (0, 1,1 ); ) n }.
a. Tìm số chiều và một cơ sở W của không gian con sinh bởi hệ vector U .
b. Tìm tham số k để u k = + (2,3, 1) 2 là một tổ hợp tuyến tính của W , và suy ra [ ] u W
You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ounces. Based on this, what is the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight. Give your answer as a decimal, to two places
Answer:
Margin of error = 4.21 ounces
Step-by-step explanation:
According to the Question,
Given That, You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ouncesTherefore, Sample mean = 31 ounces , Sample size(n) = 25 , Alpha(α) = 0.10 & Population standard deviation(σ) = 12.8 ounces
Thus, Margin of error = [tex]Z_{critical}[/tex] × σ / √n ([tex]Z_{critical}[/tex] at α=.010 is 1.645)Putting The Values, We get
1.645 × (12.8 / √25 ) ⇒ 4.2112 ≈ 4.21
Thus, the maximum margin of error associated with a 90% confidence interval for the true population mean turtle weight is 4.21 ounces