document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160812>Question 160812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A open box is to be made from a 25inch by 40inch rectangular piece of cardboard by cutting squares of equal area from each corner and turning up the sides. If the specifications require the base the base of the box to have an area of 700sq.in., what size squares should be cut from each corner?<BR>\n" );
document.write( "(Explain what the answer means in mathematical perspective.)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120468 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=120468\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (25-2x)(40-2x)=700<BR>\n" );
document.write( "1,000-130x+4x^2=700<BR>\n" );
document.write( "4x^2-130x+1,000-700=0<BR>\n" );
document.write( "4x^2-130x+300=0<BR>\n" );
document.write( "(2x-60)(2x-5)=0<BR>\n" );
document.write( "2x-5=0<BR>\n" );
document.write( "2x=5<BR>\n" );
document.write( "x=5/2<BR>\n" );
document.write( "x=2.5 in. is the sqare that is cut.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "(25-2*2.5)(40-2*2.5)=700<BR>\n" );
document.write( "(25-5)(40-5)=700<BR>\n" );
document.write( "20*35=700<BR>\n" );
document.write( "700=700<BR>\n" );
document.write( " </SPAN>\n" );
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