Question

y varies directly as x. if y =12 when x = 4, find y when x = 12

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Answer 1

Answer:

y=12

X=4

if X is triple then X=12

then if y is triple then y=36

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Answer 2

♠♠ Answer ♠♠

y varies of directly as x. This means that the equation is of the form y=kx where k

is any number.

Substituting y=12 when x=4, we get

12=k×4⇒k=3

Hence, the required equation is y=3x.

The value of y when x=5 is y=3x5=15.

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