Answer
$f(-4)=-1$
Work Step by Step
$\bf{\text{Solution Outline:}}$
Substitute the given value of $x$ in the given function, $f(x)=2x+7.$
$\bf{\text{Solution Details:}}$
Substituting $
x=-4
,$ in the given function, then
\begin{array}{l}\require{cancel}
f(-4)=2(-4)+7
\\\\
f(-4)=-8+7
\\\\
f(-4)=-1
.\end{array}