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Yakvenalex [24]
3 years ago
14

The length of a rectangle is 10 m less than three times the width, and the area of the rectangle is 77 m2 . find the dimensions

of the rectangle
Mathematics
1 answer:
Anna007 [38]3 years ago
8 0
Let the width be x, the length is then 3x-10
Area of a rectangle is length times width: x(3x-10)=77 => 3x^2-10x-77=0
Factor this quadratic equation: (x-7)(3x+11)=0 =.x=7 or x=-11/3
width cannot be negative, so the only answer is x=7
width is 7m, length is 11m
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