Answer
$G(x) = f(g(x))$
Work Step by Step
$f(x) = 3x$
$g(x) = \sqrt x$
$G(x) = 3\sqrt x$
$G(x) = 3(\sqrt x)$ therefore
$G(x) = f(g(x))$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.