Question

Plzzzzzzz help me 

If x varies inversely with y and x = 8 when y = 10, find y when x = 6.
y= 4.8
y=40/3
y=7.3
y=3/20

Answer 1

When x varies inversely with y then you'll have
xα1/y
x=k/y where k is the proportionality constant
when x=8. y=10. k=?
8=k/10
make k the subject of the formula
k=10×8
k=80.

When x=6. y=?.k=80
6=80/y
Make y the subject of the formula
y=80/6
y=40/3