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04-07-2018
Mathematics

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Bailey's rectangular dog pen for his Irish Setter must have an area of 400 square feet. Also, the length must be 20 feet longer than the width. Find the dimensions of the pen.

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04-07-2018

Hello.

400=(x+20)x is the equation or 400=x^2+20x

(x+10)=square root of 500

so x+10=10 radical 5

final answer -10 + or - 10 radical 5=x

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