Question

Y varies inversely with x. If Y=40 when X=16, find X when Y=-5

Answer 1

Answer:

y varies inversely with x

y=k*1/x

y=k/x

40=k/16

k=16*40

k=640

Now putting the value of 'k' in equation when 'y' is minus 5

-5=640*/x

x=640/-5

:. x=-128 (answer)

I hope this will help you a little bit .