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X and y vary directly and x=6 when y=42, find k. What is y when x=12?

X and y vary directly and x=6 when y=42, find k. What is y when x=12?
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2 votes
X and y vary directly and x=6 when y=42, find k. What is y when x=12?

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User Bcosynot
by
8.6k points

2 Answers

0 votes
The answer would be 21 i think.
answered
User IordanTanev
by
8.4k points
1 vote
since x and y are directly proportional , so x = ky

6 = 42k
k = 6/42 = 1/7

12= (1/7)y
y = 84
answered
User Zafar Ahmad
by
7.6k points
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