#### Answer

$3$

#### Work Step by Step

Substitute $9$ to $x$ to obtain"
$g(x) = \sqrt{x}
\\g(9)=\sqrt{9}
\\g(9)=\sqrt{3^2}
\\g(9)=3$
Thus, the missing expression in the given statement is $3$.

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$3$

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