Question

The expression 3 1/2x + 18 represents the perimeter of the rectangle shown. Write an expression that represents the length of the rectangle.

Answer 1

Explanation:

height = ¼x+5

perimeter = 2(length)+2(height)

3½x + 18 = 2(length) + 2(¼x + 5)

3½x + 18 = 2(length) + ½x + 10

3x + 8 = 2(length)

length = 1½x + 4