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Nezavi [6.7K]
3 years ago
15

The cost C of printing a magazine is jointly proportional to the number of pages p in the magazine and the number of magazines p

rinted m. (Use k for the constant of proportionality.)
(a) Write an equation that expresses this joint variation.

(b) Find the constant of proportionality if the printing cost is $65,550 for 3800 copies of a 115-page magazine.


(c) How much would the printing cost be for 3500 copies of a 84-page magazine?
Mathematics
1 answer:
Andrew [12]3 years ago
6 0
A.) C = kpm

b.) 65,550 = k * 115 * 3800 = 437,000k
k = 65,550/437,000 = 0.15

c.) C = 0.15 * 84 * 3500 = $44,100
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5. Adam spent half of his weekly allowance buying lunch. To earn
Gekata [30.6K]
Answer: $11.60

Explanation: First, you want to do 15.1 - 9.3 to find what half of his weekly allowance is, and that would be 5.8, AKA $5.80. Next, you want to multiply that number by 2, which would be 5.8(2) to get 11.6, or your final answer, $11.60.
3 0
2 years ago
A square desktop has an area of 324 square inches. What is the length of one side of the desktop
Sveta_85 [38]
Question: The area of a square is 324 square inches. What is the length of one side of the square?
The formula for finding area of squares is:

Length x Width

Squares have 4 sides, and all sides measure the same. If the area is 324 square units, that means the length and width are the same.

x X x=x2

X2=324

x squared(x²) is equal to 324. To find x, you have to do the opposite of squaring, which is finding the square root.

x2= 324 —> square root of 324=x

To find x, you have find the square root of 324.

Square root of 324 is 8

The length of one side is 18 inches
Check:
The formula for finding area is:

Length x Width

The length and width gotten was 18. Put that into the formula:

18 x 18

Multiply:

18 x 18= 324

That means the answer is correct. Your answer is 18 inches.
If you have any questions, feel free to ask in the comments! :)


8 0
3 years ago
PLEASE ANSWER ASAP!
Blizzard [7]

Step-by-step explanation:

Let the length of the bridge be x

Since, triangles ADF and BCF are similar, ratio of their corresponding sides are equal.

Therefore,

60 / 144 = 40 / x

X (length of the bridge) = <u>96 m</u>

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Given the function ƒ(x )=x^2 - 5, find ƒ(7).<br><br> 49 <br><br> 2 <br><br> 44
rosijanka [135]
Substitute the 7 in anywhere there is an x.
49-5=44
4 0
3 years ago
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qwelly [4]

Answer:

$16 should be the answer

Step-by-step explanation:

6 0
2 years ago
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