Answer
(a) $f(-5)=-10$
(b) $f(-1)=-2$
(c) $f(0)=-1$
(d) $f(3)=2$
Work Step by Step
We are given:
$f(x)=\left\{\begin{array}{l}
2x\ ~~~~~~~\mathrm{i}\mathrm{f}\ \mathrm{x}\ \leq-1\\
x-1\ ~~\mathrm{i}\mathrm{f}\ \mathrm{x}\ \gt -1
\end{array}\right.$
We evaluate by plugging in the $x$ values into the piece of the function that corresponds to the proper interval:
(a) $f(-5)=2(-5)=-10$
(b) $f(-1)=2(-1)=-2$
(c) $f(0)=0-1=-1$
(d) $f(3)=3-1=2$
