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Luba_88 [7]
3 years ago
6

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

Mathematics
2 answers:
Artyom0805 [142]3 years ago
8 0
Since x and y are directly proportional ,  so x = ky

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

12= (1/7)y
y = 84
Luda [366]3 years ago
8 0
The answer would be 21 i think.
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