anonymous
  • anonymous
The length of a rectangle is 3 inches more than three times the width. The perimeter is 78 inches. Find the length and width.
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1348709556519:dw|
Mertsj
  • Mertsj
|dw:1348710092420:dw|
Mertsj
  • Mertsj
Add all the sides and set it equal to 78

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anonymous
  • anonymous
how do i get the length
Mertsj
  • Mertsj
Did you find w, the width?
anonymous
  • anonymous
i got 25 for the width
Mertsj
  • Mertsj
How did you get that?
anonymous
  • anonymous
i added the sides like said
anonymous
  • anonymous
3w+3+w=78
anonymous
  • anonymous
is that wrong
Mertsj
  • Mertsj
|dw:1348710695880:dw|
Mertsj
  • Mertsj
You must add ALL FOUR sides to get the perimeter.
anonymous
  • anonymous
how do i fond the length
anonymous
  • anonymous
find
Mertsj
  • Mertsj
Look at the picture. The width is w and the length is 3w + 3
anonymous
  • anonymous
so i just plug in the width and i get my answer
Mertsj
  • Mertsj
What is w?
anonymous
  • anonymous
9
Mertsj
  • Mertsj
What is 3w?
anonymous
  • anonymous
do u mean 3*9 or 3w more than the width
Mertsj
  • Mertsj
3w means 3 times w so if w is 9 then 3w means 3 times 9 which is 27. So 3w = 27. Now what is 3w + 3?
anonymous
  • anonymous
30
Mertsj
  • Mertsj
So what is the length of the rectangle?
anonymous
  • anonymous
w is 9 and the length is 30
Mertsj
  • Mertsj
Good job!!
Mertsj
  • Mertsj
Does that make the perimeter 78?

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