SAT Math Practice Question #26452 - SATify | SATify

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SAT Math Practice Question #26452 - SATify | SATify

#26452

algebra

systems

Relative Motion

medium

120 sec

Positive real numbers $x$ and $y$ satisfy $y^{2} = x^{3}$ and $(x + y)^{2} = 9 x^{2}$ . What is $x - y$ ?

A.

-6

B.

-4

C.

0

D.

4

E.

6