Question

The area of a rectangle is expressed as (14r + 21) square feet. If the width of the

rectangle is 7 feet, write an expression to represent the length of the rectangle.

Answer 1

L = 2r + 3

Explanation:

Given parameters:

Area of rectangle = 14r + 21

Width of the rectangle = 7ft

Unknown:

Length of the rectangle = ?

Solution:

If the length of the rectangle is designated as L;

Area of a rectangle = Length x width

Now insert the parameters:

14r + 21 = L x 7

L =
`(14r + 21)/(7)`

L = 2r + 3