document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=887707>Question 887707</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Madisson drove to Nashville and back and spent a total of 8 hours of driving. She drove at a <BR>\n" );
document.write( "     certain speed on the trip down, but she averaged 40km/h faster on her return trip. If the total trip <BR>\n" );
document.write( "     was 600km, how fast did she drive back from Nashville?  <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #536868 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=536868\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let r = the certain speed going.\r<BR>\n" );
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document.write( "________________rate_______time________distance<BR>\n" );
document.write( "NASHVILLE_______r<BR>\n" );
document.write( "BACK FROM_______r+40<BR>\n" );
document.write( "TOTAL_______________________8___________600\r<BR>\n" );
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document.write( "The question asks for r+40 but you want to solve for r first (the way the variables were here assigned).\r<BR>\n" );
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document.write( "RT=D for rate time distance, so T and D can be found accordingly.\r<BR>\n" );
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document.write( "________________rate_______time________distance<BR>\n" );
document.write( "NASHVILLE_______r___________x__________rx<BR>\n" );
document.write( "BACK FROM_______r+40_______8-x______(r+40)(8-x)<BR>\n" );
document.write( "TOTAL_______________________8___________600\r<BR>\n" );
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document.write( "Not seeing any progress with that chart.\r<BR>\n" );
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document.write( "________________rate_______time________distance<BR>\n" );
document.write( "NASHVILLE_______r__________x___________rx<BR>\n" );
document.write( "BACK FROM_______r+40________y________(r+40)y<BR>\n" );
document.write( "TOTAL_______________________8___________600<BR>\n" );
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document.write( "This gives only two equations but three unknowns.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=8 ALIGN=MIDDLE  ALT=\"x%2By=8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=rx%2Bry%2B40y=600 ALIGN=MIDDLE  ALT=\"rx%2Bry%2B40y=600\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "The \"600\" equation is also <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%28x%2By%29%2B40y=600 ALIGN=MIDDLE  ALT=\"r%28x%2By%29%2B40y=600\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2A8%2B40y=600 ALIGN=MIDDLE  ALT=\"r%2A8%2B40y=600\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2B5y=75 ALIGN=MIDDLE  ALT=\"r%2B5y=75\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "This would seem to give a system:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28x%2By=8%29 ALIGN=MIDDLE  ALT=\"highlight_green%28x%2By=8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28r%2B5y=75%29 ALIGN=MIDDLE  ALT=\"highlight_green%28r%2B5y=75%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Which could have more than one solution.\r<BR>\n" );
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