queenbeexx6313 queenbeexx6313
  • 21-10-2017
  • Mathematics
contestada

The length of a rectangle is 5 in. more than twice its width. its area is 102 in2. find the length of the rectangle

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kritter1
kritter1 kritter1
  • 21-10-2017
Let the width be x. 
Length: 5"+2x 

102=(5+2x)x 
102=5x+2x²
0=2x²+5x-102 

x=-8.5 or x=6" (I used my graphing calculator to find this) 

Since width cannot be negative, the only solution left would be 6. The length would be (5+2(6))=11"

Hope I helped :)
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