Question

if x varies directly as 3y and x =3 when y =4, find x when y= 12​

Answer 1

Answer:

X=9

Step-by-step explanation:

X ∝ 3y

X=k 3y

as x=3, y=4 (given in question)

3=k (3)(4)

3= 12 k

3/12=k

k = 1/4

k = 0.25

When y = 12

X=k 3y

X=0.25(3)(12)

X=9.

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