the length of rectangle is x cm .the width of the rectangle is 4cm less than the length.

Question

A. write an expression in terms of x for the width of the rectangle
B. write the expression for the perimeter of the rectangle in terms of x
C. the perimeter of the rectangle is 20 cm.write an equation to find the value of x.

Answer 1

length ---- x
width = x-4, (it said so)

b) perimeter = all the way around = 2x + 2(x-4)
= ..... , simplify it

c) set your expression from b) equal to 20 and solve for x