emiliana1999owalmt emiliana1999owalmt

15-05-2018
Mathematics

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The length or a rectangular floor is 5 feet less than twice it’s it’s width. The area of the floor is 150 square feet. What is the width or the room?

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Nosiyboy Nosiyboy

15-05-2018

L=2W-5
LW=150
(2W+5)W=150
2W^2+5W-150=0
(2W-15)(W+10)=0
2W-15=0 2W=15W=7.5 ANS. FOR THE WIDTH.
L=2*7.5+5
L=15+5
L=20 ANS. FOR THE LENGTH.

20*7.5=150
150=150

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