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jmoneyhotdog
jmoneyhotdog jmoneyhotdog
  • 01-09-2016
  • Mathematics
Answered

I need help on number 12

I need help on number 12 class=

Verified Answer :

Jakcie
Jakcie Jakcie
  • 01-09-2016

First set up the equation, 82=(x)(x+7).
Then simply it 82= x^2 + 7x. --> x^2 + 7x - 82
use the quadratic formula. 

you should get 6.21 or -13.21.
Since length can't be negative, the answer should be 6.21feet.

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