document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=242129>Question 242129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The perimeter of a rectangle is 18 feet, and the area of the rectangle is 20 square feet. What is the length of the rectangle? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #177251 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=177251\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> xy=20<BR>\n" );
document.write( "x=20/y<BR>\n" );
document.write( "2x+2y=18 replace x with (20/y) & solve for y.<BR>\n" );
document.write( "2(20/y)+2y=18<BR>\n" );
document.write( "40/y+2y=18<BR>\n" );
document.write( "(40+2y*y)/y=18<BR>\n" );
document.write( "40+2y^2=18y<BR>\n" );
document.write( "2y^2+40=18y<BR>\n" );
document.write( "2y^2-18y+40=0<BR>\n" );
document.write( "2(y^2-9y+20)=0<BR>\n" );
document.write( "(y-5)(y-4)=0<BR>\n" );
document.write( "y-5=0<BR>\n" );
document.write( "y=5 ans.<BR>\n" );
document.write( "y-4=0<BR>\n" );
document.write( "y=4 ans<BR>\n" );
document.write( "x=20/5=4 ans<BR>\n" );
document.write( "x=20/4=5 ans.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "4*5=20<BR>\n" );
document.write( "2*4+2*5=18<BR>\n" );
document.write( "8+10=18<BR>\n" );
document.write( "18=18<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );