Answer
The length of the remaining side is up to 2 inches.
Work Step by Step
perimeter $\leq 12$
Substitute the given side length in the formula for perimeter. Let s be the length of the unknown side.
$2(5)+s\leq12$ $\longrightarrow$ multiply
$10+s\leq12$ $\longrightarrow$ subtract 10 from both sides
$10+s-10\leq12-10$ $\longrightarrow$ simplify
$s\leq2$
