Question

A rectangle has a length of 5 inches and a width of x inches. Write an equation to represent the perimeter of the rectangle. Explain your reasoning.

Answer 1

2x+10in

Explanation:

The perimeter of a rectangle is the lenght of its contour, so, it is equal to sum of the length of every side it has.

Since its opposite sides are equal, you can write its perimeter 2x+2y.

Now, the length is 5in, and the width is x in.

So Perimeter= 2x in+2*5 in= (2x+10) in

The in, means that x has to be evaluated using inches