A class of 40 students took a test 20 students had an average score of 65. the other students had an average score of 52. what is the average score of the whole class?

At a health club, 28% of the members are men, the rest are women. If the average man is 33 years old, and the average woman is 38 years old, what is the average age of all the members?​

Answers

Answer 1

Answer:

One: 58.5

Two 36.6

Step-by-step explanation:

One

20 students * 65 = 1300 This is the total score of all 20 students. They may not all get 65, but 1300 is what their average total is.

20 students * 52 = 1040

The total score of all 40 students was 1300 + 1040 = 2340

The average for the entire class was 2340 / 40 = 58.5

Two

This question is done almost the same way.

Supposes the total number of members is 100. That means that 28 of them are men

28 * 33 = 924     This is the total age for the men

100 - 28 = 72        Out of 100, 72 of the people there are women.

72 * 38 = 2736

The total number of years of all of the members is

924 + 2736 = 3660      

The average age of all members is 3660/100 = 36.6

Why did I pick 100 as the total membership? It is because a percentage is number out of 100. Am I allowed to invent things like that? Sure. I'm just using the definition of a percentage.

The average will make it come out the same.


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Marco needs to buy cat food. At the nearest store, 6 bags of cat food cost 19.50. How much would Marco spend on 3 bags of cat food. proportional relationships

Answers

6 bags cost 19.50

3 is half of 6

we need to find half of 19.50

in your calculator type 19.50/2

you'll find 9.75,

Hope this helped!

The function y = 5.75 + 2.5(x - 2) can be used to determine cost in dollars to rent a house of x square feet. What is the rate of change of the cost in dollars with respect to the number of square feet?

Answers

The rate of change is given by the coefficient of x in the cost function. Hence, the rate of change of cost in the function is 2.5

Given the cost function :

y = 5.75 + 2.5(x - 2)

Expanding the function and expressing in slope intercept form:

y = 5.75 + 2.5x - 5

y = 2.5x + 2.75

Therefore, the slope of the function is 2.5 ; which ubsthe rate of change of the cost function.

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On a piece of paper, graph y-3 > 2x + 2. Then determine which answer
choice matches the graph you drew.
A
B
с
D
56(0.5
56(0.5)
56(0,5)
5°(0,5
-5 (-3,-1)
5
-5 (-3,-1)
5
5 (-3,-1)
5
6 (-3,-1)
5
-5
A. Graph A
B. Graph B
c. Graph C
D. Graph D

Answers

9514 1404 393

Answer:

  C.  Graph C

Step-by-step explanation:

All of the graphs show the boundary line with the correct slope and y-intercept. To figure which graph, you can ignore everything except "y" and the inequality symbol. That means we're looking at ...

  y >

So, the values of y that are solutions are greater than those on the boundary line. The values on the boundary line are not included. This means the shading of the solution area is above the dashed boundary line, as shown in Graph C.

code for the below question


We have to calculate the area of a rectangle, a square and a circle. Create an
interface 'Shape' with three methods declarations namely 'RectangleArea' taking two
parameters, 'SquareArea' and 'CircleArea' taking one parameter each. The parameters
of 'RectangleArea' are its length and breadth, that of 'SquareArea' is its side and that of
'CircleArea' is its radius. Now create another class 'Area' containing all the three
methods 'RectangleArea', 'SquareArea' and 'CircleArea' for printing the area of
rectangle, square and circle respectively. Create an object of class 'Area' and call all the
three methods.​

Answers

Step-by-step explanation:

can I use python?

yes or no

The sum of two numbers, x and y, is 12. The difference of four times the larger number and two times the smaller number is 18. Which system of equations should you use to find the two numbers?

Answers

Answer:

4x – 2y = 18

Step-by-step explanation:

Hope this helps!

Round 171,936 to the nearest ten thousand

Answers

Answer:

Rounding = 170,000

Your answer is →  170,000

I will give brainliest!

Answers

Answer:

48 meters

Step-by-step explanation:

The drawing will be twice as large in all dimensions.  The perimeter will be the same, 48 meters.  The new scale for the new drawing should reflect that 1 unit on the drawing = x meters.  In both cases the perimeter will be the same.  The drawing size and scale factors are different.  When you get to a scale of 1:1, you'll have an actual drawing with a perimeter of 48 meters.

Which phrase has the same meaning as 12y - 2?
-
O A. Subtract the sum of 12 and y from 2.
O B. Subtract 2 from the sum of 12 and y.
O C. Subtract the product of 12 and y from 2.
D. Subtract 2 from the product of 12 and y.

Answers

D, 12y is also 12 • y and when there is an answer to a multiplication problem, it’s a product. and that minus 2 is subtracting.
B is your answer. You subtract 2 from the sum of 12y


The two lines below are parallel. If the slope of the red line is 1, what is the
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Answers

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Answers

Answer:

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Step-by-step explanation:

102 : 2/3 =

102 * 3/2 =

51 * 3 =

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Gabe's bill at Colton's was $25. If he decided to leave his server a 20% tip, how muc
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Answers

Answer:

$31.25

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Answer:

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What is the value of b?
b
B+42
B-20

Answers

Answer:

b=22°

Step-by-step explanation:

because b+42=b+b-20

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b-2b=-20-42

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Answers

The markup is 150%

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Answers

Answer:

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Step-by-step explanation:

Cover the y when you are finding the y intercept

Cover the x when you are finding the x intercept

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Step-by-step explanation:

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Answers

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Answers

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