document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=539715>Question 539715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving a quadratic equation.\r<BR>\n" );
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document.write( "The area of a field shaped like a right triangle is 600m2 ( squared). The legs of the field are fenced with steel at $10/m, while the hypotenuse is fenced with aluminum at $20/m. The perimeter of the field is 120m.  The total cost of the fencing is $1700. <BR>\n" );
document.write( "A. What is the length of each side of  fence with steel?<BR>\n" );
document.write( "B. what is the length of the side of the fence with aluminum?\r<BR>\n" );
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document.write( "Here's what I've tried:<BR>\n" );
document.write( "xy/2= 600m2<BR>\n" );
document.write( "x+y+z= 120<BR>\n" );
document.write( "10x + 10y + 20z = $1700 or x+ y + 2z = $170\r<BR>\n" );
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document.write( "Not sure how to get rid of one of the variables. <BR>\n" );
document.write( "Would greatly appreciate your assistance.\r<BR>\n" );
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document.write( "Daniel </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #353544 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=353544\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> xy/2= 600m2<BR>\n" );
document.write( "xy=1200<BR>\n" );
document.write( "x=1200/y<BR>\n" );
document.write( "----<BR>\n" );
document.write( "1200/y +y+z= 120<BR>\n" );
document.write( "1200+y^2+yz=120y<BR>\n" );
document.write( "y^2-120y+1200=-yz<BR>\n" );
document.write( "multiply by 2<BR>\n" );
document.write( "2y^2-240y+2400=-2yz<BR>\n" );
document.write( "-----\r<BR>\n" );
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document.write( "x+ y + 2z = $170<BR>\n" );
document.write( "1200/y +y+2z=170<BR>\n" );
document.write( "1200+y^2+2yz=170y\r<BR>\n" );
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document.write( "y^2-170y+1200=-2yz<BR>\n" );
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document.write( "Equate -2yz\r<BR>\n" );
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document.write( "y^2-170y+1200=2y^2-240y+2400<BR>\n" );
document.write( "y^2-70y+1200=0<BR>\n" );
document.write( "y^2-40y-30+1200=0<BR>\n" );
document.write( "(y-40)(y-30)=0<BR>\n" );
document.write( "y= 40 OR 30\r<BR>\n" );
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document.write( "The sides of triangle are 40,30,50\r<BR>\n" );
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document.write( "50 is the hypotenuse\r<BR>\n" );
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document.write( "Area = 1/2 * 30*40= 600 (check)<BR>\n" );
document.write( "Now you know how to answer the questions\r<BR>\n" );
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document.write( "m.ananth@hotmail.ca\r<BR>\n" );
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document.write( " </SPAN>\n" );
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