SOLUTION: The length of a rectangle is 3 inches greater than the width. A. Write a polynomial that represents the area of the rectangle. B. Find the area of the

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The length of a rectangle is 3 inches greater than the width. A. Write a polynomial that represents the area of the rectangle. B. Find the area of the      Log On


   



Question 555016: The length of a rectangle is 3 inches greater than the width.
A. Write a polynomial that represents the area of the rectangle.
B. Find the area of the rectangle when the width is 4 inches.

Answer by Maths68(1474) About Me  (Show Source):
You can put this solution on YOUR website!
Length = l
Width = w
The length of a rectangle is 3 inches greater than the width = l = w+3
Area of rectangle = a


A. Write a polynomial that represents the area of the rectangle.
a=lw
a=w(w+3)
a=w^2+3w
w^2+3w-a=0



(B)
Find the area of the rectangle when the width is 4 inches
a=w^2+3w
w=4
a=(4)^2+3(4)
a=16+12
a=28 sq inches