document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=577959>Question 577959</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Train a and b are traveling in the same direction on parallel tracks. Train a is traveling at 100 mph and train b is traveling at 120 mph. Train a passes a station at 7:25 am, train b passes the same station at 7:40 AM at what time will train b catch up with a.\r<BR>\n" );
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document.write( "I CAME UP WITH 8:05 AM </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #370433 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=370433\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> after passing the station, train a has a <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+40+-+25+=+15+ ALIGN=MIDDLE  ALT=\"+40+-+25+=+15+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min <BR>\n" );
document.write( "head start. In <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15+ ALIGN=MIDDLE  ALT=\"+15+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min, train a travels <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+100%2A%281%2F4%29+=+25+ ALIGN=MIDDLE  ALT=\"+100%2A%281%2F4%29+=+25+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "If I start a stopwatch when train b passes station, then<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;\" > be the time for them to meet, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d ALIGN=MIDDLE  ALT=\"d\"   DISABLED_style= \"max-width:90%; height:auto;\" > be the<BR>\n" );
document.write( "distance that b has to travel until they meet<BR>\n" );
document.write( "train b's equation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+120t+ ALIGN=MIDDLE  ALT=\"+d+=+120t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "train a's equation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+-+25+=+100t+ ALIGN=MIDDLE  ALT=\"+d+-+25+=+100t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "By substitution:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+120t+-+25+=+100t+ ALIGN=MIDDLE  ALT=\"+120t+-+25+=+100t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+20t+=+25+ ALIGN=MIDDLE  ALT=\"+20t+=+25+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+5%2F4+ ALIGN=MIDDLE  ALT=\"+t+=+5%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hr<BR>\n" );
document.write( "They will meet in 1 hr and 15 min, which is<BR>\n" );
document.write( "7:40 AM + 1:15 = 8:55 AM<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+120t+ ALIGN=MIDDLE  ALT=\"+d+=+120t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+120%2A%285%2F4%29+ ALIGN=MIDDLE  ALT=\"+d+=+120%2A%285%2F4%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+150+ ALIGN=MIDDLE  ALT=\"+d+=+150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+-+25+=+100t+ ALIGN=MIDDLE  ALT=\"+d+-+25+=+100t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+-+25+=+100%2A%285%2F4%29+ ALIGN=MIDDLE  ALT=\"+d+-+25+=+100%2A%285%2F4%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+25+%2B+125+ ALIGN=MIDDLE  ALT=\"+d+=+25+%2B+125+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+150+ ALIGN=MIDDLE  ALT=\"+d+=+150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );