document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1084334>Question 1084334</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A route up a mountain is 20 km long john followed this routeat the average speed of x km/h<BR>\n" );
document.write( "a)Write down an expression in trems of x for a number of hourshe tooks to walk up the mountain<BR>\n" );
document.write( "b)he came down the mountain by a different route the lenght ofthis route was 25 km his average speed coming down the mountain was2 m per hour greater then his average speed going up the mountainwrite down an expression in terms of x for the number of hours hetook to walk down<BR>\n" );
document.write( "c)if took john one and half hours less to come downthen to go up write down an equation in x and show that itsimplifies to 3x^2+16x-80-0   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #698445 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=698445\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed*time=distance<BR>\n" );
document.write( "x*time=20<BR>\n" );
document.write( "time=20/x<BR>\n" );
document.write( "==========<BR>\n" );
document.write( "(x+2)*time=25<BR>\n" );
document.write( "time=25/(x+2)<BR>\n" );
document.write( "==========<BR>\n" );
document.write( "The second time is 1.5 less than the first<BR>\n" );
document.write( "Therefore,(20/x)-1.5=(25/(x+2))<BR>\n" );
document.write( "multiply everything by x*(x+2)<BR>\n" );
document.write( "20(x+2)-1.5(x^2+2x)=25x<BR>\n" );
document.write( "20x+40-1.5x^2-3x=25x<BR>\n" );
document.write( "0=1.5x^2-8x-40<BR>\n" );
document.write( "3x^2-16x-80=0 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );