Answer
$(-\infty,1]$.
Work Step by Step
The given compound inequality is
$x\leq5$ and $x\leq1$.
First graph and then take the intersection of the two inequality.
The graph is shown in the image file.
We can write the compound inequality.
$x\leq5$ as $(-\infty,5]$ and $x\leq1$ as $(-\infty,1]$
The intersection is $(-\infty,5]\cap(-\infty,1]=(-\infty,1]$.
