Question

Solve:if y varies directly as the cube of x and if x =125 and x=5,find x when x=729

Answer 1

Explanation:

y varies directly as the cube of x:

this means y is proportional to the cube of x

y α x^3

or

y = cx^3

Where 'c' is some constant.

plug in the given x and y and solve for c, then you can plug in c and the new x and solve for y.

Give it a shot and come back with a question and your attempt at solving this problem if you're still confused.