1966 AHSME Problems/Problem 16

Problem

If $\frac{4^x}{2^{x+y}}=8$ and $\frac{9^{x+y}}{3^{5y}}=243$ , $x$ and $y$ real numbers, then $xy$ equals:

$\text{(A) } \frac{12}{5} \quad \text{(B) } 4 \quad \text{(C) } 6 \quad \text{(D)} 12 \quad \text{(E) } -4$

$\fbox{B}$

1966 AHSME (Problems • Answer Key • Resources)
Preceded by Problem 15	Followed by Problem 17
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