The following table shows the length and width of two rectangles:

length width
rectangle a 2x + 4 x − 1
rectangle b 3x + 1 2x − 3

which expression is the result of the perimeter of rectangle b minus the perimeter of rectangle a?
4x − 10
4x − 14
16x + 18
16x + 14

Option  

Step-by-step explanation:

we know that

The perimeter of a rectangle is equal to

where

L is the length

W is the width

Step 1

Find the perimeter of rectangle A

Substitute the values

Step 2

Find the perimeter of rectangle B

Substitute the values

Step 3

Find the result of the perimeter of rectangle B minus the perimeter of rectangle A