exam Maths Puzzle Numerical Ability

Can you please help me?
find the variation equation for the variation statement.

z varies jointly as y and the cube of x; z=160 when x=2 and y=-5

Thanks again

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exam Other Question

Hello,
Please graph the funtion y=f(x) then graph the inverse function y=f^-1(x) on the same grid.

Thank you 118. 3+ 1/x-2 = 2x-3/x-2 what do i do with this equation and how do i work it i do not understand can you please help??? :) thank you for your hard work