document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=975775>Question 975775</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jamie is travelling with her best friend Amy from Grand Forks BC to Pincher Creek AB.  They split the driving.  The 440km trip takes 2.25 hours (excluding stops).  Jamie drives at an average speed of 90km/h and Amy at an average speed of 80km/h.  What system of linear equations could help Jamie determine the distance each person drove?  How many hours does each person drive?\r<BR>\n" );
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document.write( "***it has been 37 years since I have had to do anything like this and my daughter needs help with the question.  Thank you so much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #597496 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=597496\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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;\" > = the distance in km that Jamie drove<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+440+-+d+ ALIGN=MIDDLE  ALT=\"+440+-+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the distance in km that Amy drove<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 hours that Jamie drove<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2.25+-+t+ ALIGN=MIDDLE  ALT=\"+2.25+-+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the time in hours that Amy drove<BR>\n" );
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document.write( "Jamie's equation:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+90t+ ALIGN=MIDDLE  ALT=\"+d+=+90t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Amy's equation:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+440+-+d+=+80%2A%28+2.25+-+t+%29+ ALIGN=MIDDLE  ALT=\"+440+-+d+=+80%2A%28+2.25+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Substitute (1) into (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+440+-+90t+=+80%2A%28+2.25+-+t+%29+ ALIGN=MIDDLE  ALT=\"+440+-+90t+=+80%2A%28+2.25+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+440+-+90t+=+180+-+80t+ ALIGN=MIDDLE  ALT=\"+440+-+90t+=+180+-+80t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10t+=+440+-+180+ ALIGN=MIDDLE  ALT=\"+10t+=+440+-+180+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10t+=+260+ ALIGN=MIDDLE  ALT=\"+10t+=+260+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+26+ ALIGN=MIDDLE  ALT=\"+t+=+26+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "This is more than the total time of 2.25 hrs<BR>\n" );
document.write( "The average speed for the whole trip would<BR>\n" );
document.write( "be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+440%2F2.25+=+195.55+ ALIGN=MIDDLE  ALT=\"+440%2F2.25+=+195.55+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is way more than their speeds, so I<BR>\n" );
document.write( "think you may wave copied a number wrong.<BR>\n" );
document.write( "By all means get another opinion on this.\r<BR>\n" );
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