Question

Variable y varies directly with variable x, and y = 5 when x = 8.



What is the value of x when y = 15?

Answer 1

8.3

Answer 2

ur good at this

Answer 3

the answer is 24

Answer 4

y varies directly with x
y=kx
5=k8
k=5/8
y=5/8 x
15=5/8 x
x=24

Answer 5

or more simply when y = 5 x=8
y varies directly with x
so if y is multiplied by 3 so is x
y=15 x=24