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anonymous
 one year ago
A rectangular garden, 42 feet by 20 feet, is surrounded by a walkway of uniform width. If the total area of the garden and walkway is 1248 square feet, the width of the walkway is _____.
[A] 2.5 ft [B] 3 ft [C] 2 ft [D] 3.29 ft
anonymous
 one year ago
A rectangular garden, 42 feet by 20 feet, is surrounded by a walkway of uniform width. If the total area of the garden and walkway is 1248 square feet, the width of the walkway is _____. [A] 2.5 ft [B] 3 ft [C] 2 ft [D] 3.29 ft

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Would I use the formula w= a/l?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433033340450:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433033359239:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433033378846:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433033442595:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And what would I do now?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do I add the 42 and the 2x?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Area = Length * Width 1248 = (42+2x)*(20+2x) solve for x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Um okay.. let me try 1248 = 840 + 4x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And then x would be 102?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.11248 = (42+2x)*(20+2x) 1248 = 840+124x+4x^2 ... FOIL 12481248 = 840+124x+4x^2  1248 4x^2 + 124x  408 = 0

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1use the quadratic formula to solve from here

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh... I did that so wrong... lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I have never used the quadratic formula before...

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1have you seen or heard of it before?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1ok we can use a calculator instead if you want?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1ok wolfram alpha is a good calculator to use type in 4x^2 + 124x  408 = 0 and hit enter and you'll get this link http://www.wolframalpha.com/input/?i=4x^2+%2B+124x++408+%3D+0

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1the calculator will spit out x = 34 or x = 3 as the two solutions. x is some length, so it can't be negative so only x = 3 is the true solution

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh OK! Thank you, for coping with me

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you were fine, don't worry

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Recommended Reading: http://www.purplemath.com/modules/quadform.htm
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