Answer
$f(-3)=-23$
$f(0)=-8$
$f(4)=12$
Work Step by Step
The given function is
$\Rightarrow f(x)=5x-8$
Substitute $x=-3$.
$\Rightarrow f(-3)=5(-3)-8$
Simplify.
$\Rightarrow f(-3)=-15-8$
$\Rightarrow f(-3)=-23$
Substitute $x=0$.
$\Rightarrow f(0)=5(0)-8$
Simplify.
$\Rightarrow f(0)=0-8$
$\Rightarrow f(0)=-8$
Substitute $x=4$.
$\Rightarrow f(4)=5(4)-8$
Simplify.
$\Rightarrow f(4)=20-8$
$\Rightarrow f(4)=12$
