Question

A rectangle has an area of 72 swaure units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What is the rectangle's length?​

Answer 1

8 units

Explanation:

Area of a rectangle = Width multiplied by Length

Substitute in all the known numbers into this formula to get

72 = (9) ×
`(2x+4)`

Solve the equation for x, to find out the length

`9(2x+4)=72`

`2x+4=72/9`

`2x+4=8`

`2x=8-4`

`2x=4`

`x=4/2`

`x=2`

Length of the rectangle =
`(2x+4)`

`2(2)+4`

`4+4=8`