Question

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

Answer 1

Answer:

 L  = 2r  + 3

Step-by-step 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  = $\frac{14r + 21}{7}$  

           L  = 2r  + 3