koolboikenny
koolboikenny koolboikenny
  • 10-11-2016
  • Mathematics
contestada

margaret is planning a rectangular garden. its length is 4ft less than twice its width. its area is 170 ft squared. what are the dimensions of the garden?

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nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 15-11-2016
Let the width be x, it length is 2x - 4
Area = length x width
x(2x - 4) = 170
2x^2 - 4x - 170 = 0
x^2 - 2x - 85 = 0
x = 10.27

Therefore, the width ≈ 10.27 ft and the length is 2(10.27) - 4 ≈ 16.54
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