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noname [10]
1 year ago
11

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

Mathematics
2 answers:
Sedaia [141]1 year ago
6 0

Answer: y = 15

Step-by-step explanation:  

8_murik_8 [283]1 year ago
3 0

Answer:

y = 15

Step-by-step 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

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