Question

The length of a rectangle is 5 inches and the width is x inches. What is the perimeter, in inches?

Answer 1

Answer:  2x+10   inches

Explanation:

There are 2 opposite sides that are x inches long, so they add to x+x = 2x

Then there are 2 opposite sides that are 5 inches long, which add to 5+5 = 10

Overall, the four sides add to 2x+10 inches

You could also apply the formula below

P = 2L+2W

P = 2x+2*5

P = 2x+10

That formula is the same as P = 2(L+W)