aa101
aa101 aa101
  • 02-08-2018
  • Mathematics
contestada

I don’t understand how to find the dimension,
Need help :c

I dont understand how to find the dimension Need help c class=

Respuesta :

choixongdong
choixongdong choixongdong
  • 02-08-2018

Width = W

Length = 2 times the width plus 3 feet = 2W + 3

Area of triangle A = L * W

A = W (2W + 3)

20 = 2W^2 + 3W

2W^2 + 3W - 20 = 0

(W + 4) (2W - 5) = 0

W + 4 = 0; W = - 4 (width cannot be negative, excluded)

2W - 5 = 0

2W = 5

W = 2.5

L = 2W + 3 = 2(2.5) + 3 = 8

Answer:

Width = 2.5 feet and Length = 8 feet

Hope it helps.

Answer Link

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