Question

If x varies inversely as y and y=40 when x=4, how do you find x when y=20?

Answer 1

I didn't understand well the question but I think is about direct and inverse proportion.

Explanation:

X is inversly proportional to Y
`x=k/y`

`x=4`
`y=40`

`4=k/40`

`k=40X4=160`

`x=160/y`

`y=20`

`x=160/20=8`

Answer:
`x=8`
`y=20`