Answer:
The perimeter of the rectangle is 10 + 2x.
Step-by-step explanation:
The formula for the perimeter of a rectangle is 2(l + w) where l = length and w = width because you add up the length of all the sides.
So we can plug in our givens into the formula and simplify:
2(5 + x)
So the perimeter is: 10 + 2x
Notice that we cannot simplify the expression further because there is an unknown (the length).
