Question

H(x)=3^x and g(x)=5x-7 then h(g(2))

Answer 1

$\bf \begin{cases} h(x)=3^x\\ g(x)=5x-7 \end{cases}~\hspace{7em}g(2)=5(2)-7\implies g(2)=3 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ h(~~g(2)~~)\implies h(~~3~~)\implies 3^3\implies 27$