SOLUTION: If the length of a rectangle is 4 feet more than its width. How do i use a variable to express the area of the rectangle?
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Question 799971: If the length of a rectangle is 4 feet more than its width. How do i use a variable to express the area of the rectangle? Answer by jerryguo41(197) (Show Source):
You can put this solution on YOUR website! Set A=Area, l=length, and h=height
You know that
Now after reading the problem you also know that or "length of a rectangle is 4 feet more than its width"
Now replace l with w+4 and you get:
If you want to only use one variable you can directly write it as where x is implied to be the shorter side.
Resulting in
