Suppose you want to build a deck around your pool with a uniform width on all sides. The pool measures 15 yards by 20 yards. You want to increase the area of the pool to 600 yd2. What is the width of the deck? Approximately 3.6 yards Approximately 4.5 yards Approximately 5.1 yards Approximately 6.7 yards

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Suppose you want to build a deck around your pool with a uniform width on all sides. The pool measures 15 yards by 20 yards. You want to increase the area of the pool to 600 yd2. What is the width of the deck? Approximately 3.6 yards Approximately 4.5 yards Approximately 5.1 yards Approximately 6.7 yards

Mathematics
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@Loser66 i am lost..
the pool a rectanlge im guessing? and i know that the area of the pool (15*20) is 300, and that it need to be doubled to get 600?
Approximately 3.6 yards

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how? i wanna know please
ok
|dw:1439749701050:dw|
Let's wait for @BioHazard9064
(20 + 2X) * (15 + 2X) = 600 300 + 40X + 30X + 4X^2 = 600 300 + 70X + 4X^2 = 600 4X^2 + 70X - 300 = 0
Too many guidance will confuse you. :)
although I agree drawing a graph would help a lot for a start
okay, but how is it 3.6?
600 - 300 = 300. We need 300 square yards of deck
So if we let x = the width
so then you do 300 = 3x^2 + 70x.
Then you use it in a quadratic equation with a =4, b=70 and c= -300 to get x = 3.56 so you would round it up to 3.6
you understand?
yes i do. sorry, was distracted lol
Glad to help

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