Question 1127432: The length of a rectangular fence is 5 more than twice the width. The perimeter is 40 feet, find the length Answer by 4198181(13) (Show Source):
You can put this solution on YOUR website! Let a stand for the width and b stand for the length.
The length is 5 more than two times the width, so:
b=2a+5
and the perimeter is all four sides added together so:
40=2a+2b
use substitution
40=2a+2(2a+5)
40=2a+4a+10
30=6a
5=a this means that the width is 5 feet, plug this back in to the equation
2(5)+5=15 so the length is 15 feet
Answer: The length of a rectangular fence is 15 feet
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