Concept explainers
A
  
a)To write a polynomial that represents the area of the rectangular football field.
A
Answer to Problem 43E
The solution is :
a)
Explanation of Solution
Given information:
a)A rectangular field whose length and breadth are (10x+10)ft and (4x+20) ft.
b)If width =160 feet.
Calculations:-
a) Area of the football field:
=Length *Breadth
=(10x+10)*(4x+20)
=
=
B
  
b)Find the area of the football field when the width is 160 feet.
B
Answer to Problem 43E
The solution is :
b)57600 sq. ft
Explanation of Solution
Given information:
a)A rectangular field whose length and breadth are (10x+10)ft and (4x+20) ft.
b)If width =160 feet.
Calculations:-
b)width =160 feet
(4x+20)=160
4x=140
x=35
area=
=40(30*30)+200(35)+40(35)+200
=49000+8600
=57600
Chapter 7 Solutions
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