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OpenStudy (anonymous):
perimeter of rectangle is 40ft. length is 8ft longer then width. Find dimensions let x be length and y width 2x+2y=
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OpenStudy (anonymous):
2x+2y=40 l=w+8 2(w+8)+2w=40 2w+16+2w=40 4w=24 w=6
OpenStudy (anonymous):
switch all the w's to y
OpenStudy (anonymous):
Here: \[ 2l+2w=40\\ l=8+w \]Substituting: \[ 2(8+w)+2w=40\\ 16+4w=40\\ 4w=24\\ w=6\\ l=8+6=14 \]
OpenStudy (anonymous):
thanks
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