Question

The length of a rectangle is 2 units shorter than one-fifth of the width, x.

Which expression represents the perimeter of the rectangle?
A. 2/5x−4

B. 12/5x−2

C. 12/5x−4

​ C. 2/5x−8 ​

Answer 1

C. 12/5x−4

Explanation:

took the test

Answer 2

C.
`P=(12x)/(5) + 4`

Explanation:

Width = x

Length = one fifth of width minus 2

Length =
`(1)/(5)x-2`

Perimeter is given by the formula

`P=2(l+b)`

`P=2((1)/(5)x-2+x)`

`P=2((x)/(5)-2+x)`

`P=2* (x-2 * 5+5 * x)/(5)`

`P=2* (x-10+5x)/(5)`

`P=2* (6x)/(5) - 2* (-10)/(5)`

`P=2* (6x)/(5) + 2* (10)/(5)`

`P=(12x)/(5) + 4`