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Arturiano [62]
3 years ago
11

Suppose y varies directly with X, and Y =22 when x = 8 what is the value of y when x= 10

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
8 0
Use K=y/x
   
K=22/x

K=22/8

then simplify

K=11/4
mars1129 [50]3 years ago
7 0
27.5

22= K(8)

Divide 8 on both sides to get your K value

2.75 = K

Plug your K value into the other equation

Y= 2.75(10)

Solve to get Y

Y= 27.5 When the problem asks "vary directly", it is saying that you are multiplying your K value with your X value(K*X). If the problem is asks "vary indirectly", it is saying that you are dividing your K value by your X value (K/X)
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a family pays 45 dollars each month for cable television.the cost increase 7 percent.how many dollars is the increase?
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2 years ago
I need help please I need it
SashulF [63]

Step-by-step explanation:

It asks you to choose values for w, the width, and evaluate the equation for each. It describes the constraint "the perimeter of 20 units" The perimeter of a rectangle is the length of all the lines of a regtangle.

Or

2L + 2W = 20 reduce this to simplest for by dividing both sides by 2;

L + W = 10, so the length plus the width is 10. Rearrange it to be W = 10 - L. Values of W can range from 1 to 9. Now sove for a few points in the function.

f(W) = 10W - W^2

3; 10(3) - 3^2 = 30 - 9 = 21.

If we look at the constraint, L = 10 - W, when the width is 3 the length must be 7. The area of a rectangle is L x W, 3 x 7 = 21. That checks against the function.

Solve for additional points.

4; 10(4) - 4^2 = 40 - 16 = 24.

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4 0
3 years ago
What is bigger 7.09 or 7.2.
docker41 [41]
7.2 would be bigger than 7.09
6 0
2 years ago
What is the answer/explanation for this question
yan [13]
There’s no picture or anything.
8 0
3 years ago
Read 2 more answers
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