Question

y varies inversely with x, and x = 120 when y = 90. Find the inverse variation equation and use it to find the value of x when y = 30.


210

40

360

22.5

Answer 1

\[\huge y=\frac{k}{x}\rightarrow 90=\frac{k}{120} \]
solve for k then find x with the new y value....

Answer 2

360

Answer 3

\[90/30=120^{-1}/x ^{-1}\]
x=360

Answer 4

thanks(: for the help