document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207205>Question 207205</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780077224820/algebrahomeworkh>Elementry and Intermediate Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I need some help please. This type of problem - I just don't get it. \r<BR>\n" );
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document.write( "Thomas is going to make an open-top box<BR>\n" );
document.write( "by cutting equal squares from the four corners of an<BR>\n" );
document.write( "11 inch by 14 inch sheet of cardboard and folding up the<BR>\n" );
document.write( "sides. If the area of the base is to be 80 square inches, then<BR>\n" );
document.write( "what size square should be cut from each corner? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #156667 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=156667\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Starting  with  the  11 x 14  sheet,,,and  taking  a  square  with sides  of \"d\" away,  on  all  4  corners,  leaves  a  base  of  80 sq inches.<BR>\n" );
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document.write( "(11-2d)(14-2d)=80<BR>\n" );
document.write( "154 -22d-28d+4d^2 = 80<BR>\n" );
document.write( "4d^2-50d+74=0<BR>\n" );
document.write( "2d^2-25d+37=0<BR>\n" );
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document.write( "solve  using  quadratic  formula<BR>\n" );
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document.write( "a=2,,,,b=-25,,,,c=37<BR>\n" );
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document.write( "d=[-(-25)+/-sqrt{(-25)^2 -4(2)(37)}]/2(2)<BR>\n" );
document.write( "d=[25+/-sqrt{625-296}]/4<BR>\n" );
document.write( "d=[25+/-18.138]/4<BR>\n" );
document.write( "d=1.715, 10.785(too  big)<BR>\n" );
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document.write( "checking,,,(11-2(1.715))*(14-2(1.715))=(11-3.43)(14-4.43)=80<BR>\n" );
document.write( "7.57*10.57=80,,,,ok<BR>\n" );
document.write( ".  </SPAN>\n" );
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