SAT Math Practice Question #24279 - SATify | SATify

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SAT Math Practice Question #24279 - SATify | SATify

#24279

algebra

exponents

medium

120 sec

Real numbers $x$ and $y$ satisfy the equations $2^{x} = 8^{y + 3}$ and $2 5^{y} = 5^{x - 1}$ . What is $x y$ ?

A.

60

B.

90

C.

100

D.

110

E.

120