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Robert wants to fence a rectangular plot of land of at least 500 square feet while using the least amount of fencing possible. He wants the width of the plot to be 5 ft longer than the length. What is the width of the plot?

isthebest123  Oct 2, 2018

Best Answer 

 #2
avatar+14506 
+3

x (x+5) = 500 (at least)

x^2+5x-500 = 0       quadratic formula shows x = 20    plot is   20  x  25 '

 

20 x 25 = 500 sq ft

perimeter = 90 feet     

ElectricPavlov  Oct 2, 2018
edited by ElectricPavlov  Oct 3, 2018
 #1
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the answer is 25

 

 

 

this is isthebest123

Guest Oct 2, 2018
edited by Guest  Oct 2, 2018
 #2
avatar+14506 
+3
Best Answer

x (x+5) = 500 (at least)

x^2+5x-500 = 0       quadratic formula shows x = 20    plot is   20  x  25 '

 

20 x 25 = 500 sq ft

perimeter = 90 feet     

ElectricPavlov  Oct 2, 2018
edited by ElectricPavlov  Oct 3, 2018

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