document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=902234>Question 902234</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Running at an average rate of 7 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 3 meters per second. The total time for the sprint and the jog back was 3 minutes 30 seconds. Find the length of the track. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #547183 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=547183\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> _________________speed_________time________distance<BR>\n" );
document.write( "ONE WAY___________7_____________x__________d<BR>\n" );
document.write( "OTHER WAY_________3_____________y__________d\r<BR>\n" );
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document.write( "Either convert speeds to meters per minute or convert times to seconds.  Converting the speeds seems better.\r<BR>\n" );
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document.write( "For rate r in meters per second:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2A%28m%2Fsec%29%2A60%28sec%2Fmin%29 ALIGN=MIDDLE  ALT=\"r%2A%28m%2Fsec%29%2A60%28sec%2Fmin%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "_________________speed(m/min)___________time________distance<BR>\n" );
document.write( "ONE WAY___________420____________________x__________d<BR>\n" );
document.write( "OTHER WAY_________180____________________y__________d\r<BR>\n" );
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document.write( "The tabulated data allows for some equations:\r<BR>\n" );
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document.write( "_________________speed(m/min)___________time________distance<BR>\n" );
document.write( "ONE WAY___________420____________________x__________d=420x<BR>\n" );
document.write( "OTHER WAY_________180____________________y__________d=180y<BR>\n" );
document.write( "Total__________________________________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%261%2F2 ALIGN=MIDDLE  ALT=\"3%261%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "This indicates a system of TWO equations:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28system%28420x=180y%2Cx%2By=3%261%2F2%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28system%28420x=180y%2Cx%2By=3%261%2F2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Finally, knowing x or y, you can evaluate the length of the track, d.<BR>\n" );
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