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OpenStudy (anonymous):
The length of a rectangle is twice its width. The perimeter of the rectangle is 90 cm. What are the length and width?
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OpenStudy (anonymous):
\[l=2w\\ p=2(l+w)\qquad\text{=perimeter}\]
OpenStudy (anonymous):
so, we plug in \[90=2(2w+w)=2(3w)\\ 90=6w\\ w=?\]
OpenStudy (anonymous):
ok so how do i figure out what w is??
OpenStudy (anonymous):
90=6w divide both sides by 6
OpenStudy (anonymous):
15 and 1 ?
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