SOLUTION: LENGTH OF RECTANGLE 26CM WHAT WIDTH WILL MAKE THE PERIETER GREATER THAN 80CM

Question 164853This question is from textbook algebra 1
: LENGTH OF RECTANGLE 26CM
WHAT WIDTH WILL MAKE THE PERIETER GREATER THAN 80CM This question is from textbook algebra 1

Answer by MRperkins(300) (Show Source): You can put this solution on YOUR website!
We know the formula for a rectangle is P=L+L+W+W or P=2L+2W
We are given L=26cm and P>80
In order to find out when P>80 we need to know when P=80.
So plug this into the formula and you get:
or
Now subtract 52 from each side:
or
Divide both sides by 2 and you get
We have found the width that will make the perimeter exactly 80 cm. However, we want a perimeter greater than 80 cm. So any width greater than 14 cm will work.

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