document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=917069>Question 917069</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dora drove east at a constant rate of 75 kph. One hour later, Tim started driving on the same road at a constant rate of 90 kph. For how long was Tim driving, before he caught up to Dora?\r<BR>\n" );
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document.write( "I have tried to use a table<BR>\n" );
document.write( "i set it up like this<BR>\n" );
document.write( "Name|D(mi)|R(kph)|T(hr.)|<BR>\n" );
document.write( "Dora|  d  |75    |t     |<BR>\n" );
document.write( "Tim |  d  |90    |t+1   |<BR>\n" );
document.write( "and then I went and i tried to put it into an equation<BR>\n" );
document.write( "75t=90(t+2)<BR>\n" );
document.write( "75t=90t+180<BR>\n" );
document.write( "-90t -90t<BR>\n" );
document.write( "-15t=180<BR>\n" );
document.write( "____ ____<BR>\n" );
document.write( "-15  -15<BR>\n" );
document.write( "t=-12<BR>\n" );
document.write( "but It is not an answer on my multiple choice and it wouldn't be a negative 12 hours<BR>\n" );
document.write( "-15  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #556508 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=556508\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> RT=D rate time distance, uniform rates rule for travel\r<BR>\n" );
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document.write( "Let t be amount of time Tim drove to catchup to Dora;<BR>\n" );
document.write( "Let d be the distance that both Tim and Dora traveled when Tim reaches Dora.\r<BR>\n" );
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document.write( "______________________speed________time________distance<BR>\n" );
document.write( "Dora___________________75__________t+1__________d<BR>\n" );
document.write( "Tim____________________90___________t___________d\r<BR>\n" );
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document.write( "The use of this travel uniform rates rule gives <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75%28t%2B1%29=d ALIGN=MIDDLE  ALT=\"75%28t%2B1%29=d\"   DISABLED_style= \"max-width:90%; height:auto;\" >  and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=90%2At=d ALIGN=MIDDLE  ALT=\"90%2At=d\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Both are formula for the same distance, d.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2875%28t%2B1%29=90t%29 ALIGN=MIDDLE  ALT=\"highlight%2875%28t%2B1%29=90t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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