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4 votes
Suppose that y varies directly with x

and y=
= 10 when x = 20. What is y
when x = 15?
Be sure to simplify your answer.

Suppose that y varies directly with x and y= = 10 when x = 20. What is y when x = 15? Be-example-1

2 Answers

6 votes

Answer:

y = 7.5

Explanation:

Given y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 10 when x = 20

10 = 20k ( divide both sides by 20 )


(1)/(2) = k

y =
(1)/(2) x ← equation of variation

When x = 15 , then

y =
(1)/(2) × 15 =
(15)/(2) = 7.5

User IamIronMAN
by
8.5k points
4 votes

Answer:


10 * 2 = 20 \\ 5 * 3 = 15

answer:10×2=20

5×3=15

User ZiggZagg
by
8.4k points

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