Answer
$(5,2)$ is not a solution of the inequality.
Work Step by Step
The given inequality is
$\Rightarrow x-y\leq 0$
Substitute $5$ for $x$ and $2$ for $y$.
$\Rightarrow 5-2\leq 0$
Simplify.
$\Rightarrow 3\leq 0$
False.
Hence, $(5,2)$ is not a solution of the inequality.
