anonymous
  • anonymous
the area of the rectangle shown is 180 square cm. find it dimentions. use the equation: L(l+3)=180. (you may want to distribute first.)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
|dw:1328032400814:dw|
anonymous
  • anonymous
\[l^2+3l-180=0\]\[(l+15)(l-12)=0\] l=12 or -15, but the length can't be negative
anonymous
  • anonymous
So l would be 12, l+3=15

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anonymous
  • anonymous
a. 18cm=10cm b.12cm=15cm c.9cmx20cm d.6cmx30cm
anonymous
  • anonymous
so b is the answer right?
anonymous
  • anonymous
12cmx15cm
anonymous
  • anonymous
l(l+3)=180 l^2+3l-180=0 l^2+15l-12l-180=0 l(l+15)-12(l-15)=0 (l-12)(l+15)=0 l=12/l=-15 since length can't b negativ length shud b 12cm and width has to b 15cm.
anonymous
  • anonymous
wow great Job everyone!

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