anonymous
  • anonymous
Will Best answer! Last Question: A rectangle has an area of 72 square units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What is the rectangle's length?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
How would I determine for x?
AbdullahM
  • AbdullahM
Do you know how to calculate area for a rectangle?

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anonymous
  • anonymous
To be honest no, I havne't learned about it... My teacher said it was a trick question, and if we figured it out and explained it to him he would give us a prize.
AbdullahM
  • AbdullahM
\(\sf\Large Area = Length \times Width\)
anonymous
  • anonymous
okay
AbdullahM
  • AbdullahM
They gave you \(\sf Area=72\\ Width = 9\\Length = 2x+4\)
anonymous
  • anonymous
the length... how would we determine the length?
Vocaloid
  • Vocaloid
area = length*width 72 = length*9 solve for length x is actually irrelevant in this question
AbdullahM
  • AbdullahM
So, first lets plug that into the formula and then see. :)
AbdullahM
  • AbdullahM
\(\sf\Large 72 = (2x+4) \times 9\)
AbdullahM
  • AbdullahM
^ true...

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