document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1107731>Question 1107731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bus left the city at 8:00am,traveling at 70km/h.Another bus,traveling in the opposite direction at 55km/h,left at 11:00am.At what time were the buses 460km apart? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #722749 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=722749\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Start a stopwatch when the 2nd<BR>\n" );
document.write( "bus leaves the city at 11 AM.<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the time in hrs on the<BR>\n" );
document.write( "stopwatch when the buses are <BR>\n" );
document.write( "460 km apart<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%5B1%5D+ ALIGN=MIDDLE  ALT=\"+d%5B1%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance in km the 1st bus travels<BR>\n" );
document.write( "from 8 AM to 11 AM<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance in km the 2nd bus travels<BR>\n" );
document.write( "during time <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the stopwatch<BR>\n" );
document.write( "-----------------------------------------<BR>\n" );
document.write( "Equation for the 1st bus from 8 AM to 11 AM<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%5B1%5D+=+70%2A3+ ALIGN=MIDDLE  ALT=\"+d%5B1%5D+=+70%2A3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for the 2nd bus:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+55t+ ALIGN=MIDDLE  ALT=\"+d+=+55t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for the 1st bus during time <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > on stopwatch<BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+460+-+d%5B1%5D+-+d+=+70t+ ALIGN=MIDDLE  ALT=\"+460+-+d%5B1%5D+-+d+=+70t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------------------------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%5B1%5D+=+210+ ALIGN=MIDDLE  ALT=\"+d%5B1%5D+=+210+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Plug (2) into (3)<BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+460+-+210+-+55t+=+70t+ ALIGN=MIDDLE  ALT=\"+460+-+210+-+55t+=+70t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+250+-+55t+=+70t+ ALIGN=MIDDLE  ALT=\"+250+-+55t+=+70t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+125t+=+250+ ALIGN=MIDDLE  ALT=\"+125t+=+250+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2+ ALIGN=MIDDLE  ALT=\"+t+=+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------------------------------------------<BR>\n" );
document.write( "2 hrs after 11 AM, or at 1 PM, the buses are 460 km apart<BR>\n" );
document.write( "------------------------------------------------------<BR>\n" );
document.write( "check the answer:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+55t+ ALIGN=MIDDLE  ALT=\"+d+=+55t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+55%2A2+ ALIGN=MIDDLE  ALT=\"+d+=+55%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+110+ ALIGN=MIDDLE  ALT=\"+d+=+110+\"   DISABLED_style= \"max-width:90%; height:auto;\" > km<BR>\n" );
document.write( "The first bus travels <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+460+-+110+=+560+ ALIGN=MIDDLE  ALT=\"+460+-+110+=+560+\"   DISABLED_style= \"max-width:90%; height:auto;\" > km from <BR>\n" );
document.write( "8 AM to 1 PM, or 5 hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+350+=+r%2A5+ ALIGN=MIDDLE  ALT=\"+350+=+r%2A5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+=+70+ ALIGN=MIDDLE  ALT=\"+r+=+70+\"   DISABLED_style= \"max-width:90%; height:auto;\" > km/hr<BR>\n" );
document.write( "OK<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );