document.write( "Question 248944: We have these word problems to do and they are so difficult for me to complete. Once I find the equations I can pretty much finish the problem but finding the equations is proving to be challenging. Please help.\r
\n" ); document.write( "\n" ); document.write( "Word Problem: A rancher can affors 300 feet of fencing to build a corral that's divided into two equal rectangles. What dimensions will maximize the corral's area?\r
\n" ); document.write( "\n" ); document.write( "I'm given a picture where the length is 2x and the width is y and the hint from my teacher was to use the distance formula. I'm completely lost. Thank you in advance for your help.
\n" ); document.write( "

Algebra.Com's Answer #181461 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Word Problem: A rancher can afford 300 feet of fencing to build a corral that's divided into two equal rectangles.
\n" ); document.write( " What dimensions will maximize the corral's area?
\n" ); document.write( "I'm given a picture where the length is 2x and the width is y
\n" ); document.write( ":
\n" ); document.write( "I have no idea why you would use distance formula, perhaps he meant the perimeter formula
\n" ); document.write( ":
\n" ); document.write( "The fence equation
\n" ); document.write( "2(2x) + 3y = 300
\n" ); document.write( "4x + 3y = 300
\n" ); document.write( "3y = (300 - 4x)
\n" ); document.write( "y = 100 - \"4%2F3\"x
\n" ); document.write( ":
\n" ); document.write( "Area = L * W
\n" ); document.write( "A = 2x * y
\n" ); document.write( "Replace y with(100-\"4%2F3\"x)
\n" ); document.write( "A = 2x(100-\"4%2F3\"x)
\n" ); document.write( "A = 200x - 2x(\"4%2F3\"x)
\n" ); document.write( "A = 200x -\"8%2F3\"x^2
\n" ); document.write( ":
\n" ); document.write( "A quadratic equation, the max area occurs at the axis of symmetry
\n" ); document.write( "The formula for that: x = -b/(2a)
\n" ); document.write( "In this equation a=-8/3; b=200
\n" ); document.write( "x = \"-200%2F%282%28-8%2F3%29%29\"
\n" ); document.write( "x = \"-200%2F%28-16%2F3%29\"
\n" ); document.write( "x = -200 * \"-3%2F16\"
\n" ); document.write( "x = +37.5
\n" ); document.write( ":
\n" ); document.write( "Find y:
\n" ); document.write( "y = 100 - \"4%2F3\"x
\n" ); document.write( "y = 100 - \"4%2F3\"*37.5
\n" ); document.write( "y = 100 - 50
\n" ); document.write( "y = 50 ft
\n" ); document.write( ";
\n" ); document.write( "Since the dimensions are are 2x by y, max area occurs when:
\n" ); document.write( "2(37.5) = 75 ft is the length and 50 ft is the width
\n" ); document.write( ":
\n" ); document.write( "Check the perimeter (fence length)
\n" ); document.write( "2(75) + 3(50) =
\n" ); document.write( "150 + 150 = 300
\n" ); document.write( ";
\n" ); document.write( ";
\n" ); document.write( "C
\n" ); document.write( "
\n" );