Question

if a rectangle's length is 2 x − 1 and the width is 4 x − 2 , write an expression for the perimeter and an expression for the area.

Answer 1

Explanation:

2p/2 = 2x+7

1) 2x+7 -x - 5 =

width = x + 2

2) 2p/2 = 21 in

x + 5 + x + 2 = 21

2x = 14

x = 7

lenght = 7 + 5 = 12 in

width = 7 + 2 = 9 in

3 )

A = (x+5)(x+2)

4)

A = 12 x 9 = 108