Answer
$ g(-3)=-8$
$ g(0)=16$
$g(8)=80$
Work Step by Step
The given function is
$\Rightarrow g(x)=8x+16$
Substitute $x=-3$.
$\Rightarrow g(-3)=8(-3)+16$
Simplify.
$\Rightarrow g(-3)=-24+16$
$\Rightarrow g(-3)=-8$
Substitute $x=0$.
$\Rightarrow g(0)=8(0)+16$
Simplify.
$\Rightarrow g(0)=0+16$
$\Rightarrow g(0)=16$
Substitute $x=8$.
$\Rightarrow g(8)=8(8)+16$
Simplify.
$\Rightarrow g(8)=64+16$
$\Rightarrow g(8)=80$
