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If xx and y vary directly and y is 21 when x is 7, find y when x is 5
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5 votes
If xx and y vary directly and y is 21 when x is 7, find y when x is 5

User DanY
by
3.2k points

2 Answers

4 votes

Answer:

y = 15

Explanation:

We need to solve for k

y = x

21 = 7k Divide both sides by 7 to solve for k

3 = k

y = xk

y = 5(3)

y = 15

User Ndreckshage
by
3.3k points
7 votes

Answer: y = 15

Step-by-step explanation:

User Rowan Smith
by
3.8k points
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