Equivalent Expressions

SAT Math· difficulty 4/5

9^{x+1}

A
$9 + 9^x$
B
$3^{2x+1}$
C
$9 \cdot 9^x$
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D
$9^x + 1$

Explanation

9^{x+1} = 9^x \cdot 9^1 = 9 \cdot 9^x

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