If x^2/3=y, what does x^4 equal in terms of y?

(A)y^2

(B)y^8/3

(C)y^3

(D)y^5

(E) y^6

Please use parentheses when you submit a question like this. Technically, you said , even though I’m pretty sure you meant . Anyway…

First raise each side to the 3rd power to get rid of the fractional exponent:

Now square both sides to get to :