document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1095787>Question 1095787</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the distance between two place on road A and B is 70 km. the A car starts from A and other from B. if they travel in the same direction,  they will meet after 7 hours.  if they travel towards each other they will  meet after 1 hour, then find their speed<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 #710299 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=710299\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f ALIGN=MIDDLE  ALT=\"f\"   DISABLED_style= \"max-width:90%; height:auto;\" >= speed of the faster car, in km/h<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s ALIGN=MIDDLE  ALT=\"s\"   DISABLED_style= \"max-width:90%; height:auto;\" >= speed of the slower car, in km/h<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f%2Bs=70%2F1%2Cf-s=70%2F7%29 ALIGN=MIDDLE  ALT=\"system%28f%2Bs=70%2F1%2Cf-s=70%2F7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f%2Bs=70%2Cf-s=10%29 ALIGN=MIDDLE  ALT=\"system%28f%2Bs=70%2Cf-s=10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f-s=10 ALIGN=MIDDLE  ALT=\"f-s=10\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=s%2B10 ALIGN=MIDDLE  ALT=\"f=s%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f%2Bs=70%2Cf=s%2B10%29 ALIGN=MIDDLE  ALT=\"system%28f%2Bs=70%2Cf=s%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2B10%2Bs=70 ALIGN=MIDDLE  ALT=\"s%2B10%2Bs=70\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2s%2B10=70 ALIGN=MIDDLE  ALT=\"2s%2B10=70\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2s=70-10 ALIGN=MIDDLE  ALT=\"2s=70-10\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2s=60 ALIGN=MIDDLE  ALT=\"2s=60\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=60%2F2 ALIGN=MIDDLE  ALT=\"s=60%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=30 ALIGN=MIDDLE  ALT=\"s=30\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28s=30%2Cf=s%2B10%29 ALIGN=MIDDLE  ALT=\"system%28s=30%2Cf=s%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28system%28s=30%2Cf=40%29%29 ALIGN=MIDDLE  ALT=\"highlight%28system%28s=30%2Cf=40%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "EXPLANATION<BR>\n" );
document.write( "When traveling towards each other,<BR>\n" );
document.write( "they reduce the distance between them at a rate of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70km%2F%221+hour%22 ALIGN=MIDDLE  ALT=\"70km%2F%221+hour%22\"   DISABLED_style= \"max-width:90%; height:auto;\" > , so<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2Bf=70%2F1 ALIGN=MIDDLE  ALT=\"s%2Bf=70%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2Bf=70 ALIGN=MIDDLE  ALT=\"s%2Bf=70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "If both cars travel in the same direction,<BR>\n" );
document.write( "the distance between them will change (increase or decrease)<BR>\n" );
document.write( "as a rate of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70km%2F%227+hours%22=%2210+km+%2F+h%22 ALIGN=MIDDLE  ALT=\"70km%2F%227+hours%22=%2210+km+%2F+h%22\"   DISABLED_style= \"max-width:90%; height:auto;\" > .<BR>\n" );
document.write( "If the faster car was running away from the slower one,<BR>\n" );
document.write( "they would bm never meet,<BR>\n" );
document.write( "so if they meet in 7 hours,<BR>\n" );
document.write( "the faster car is chasing the slower one.<BR>\n" );
document.write( "The distance between will be decreasing at a rate of<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f-s=10 ALIGN=MIDDLE  ALT=\"f-s=10\"   DISABLED_style= \"max-width:90%; height:auto;\" > .<BR>\n" );
document.write( "So, we have to solve the system<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f%2Bs=70%2Cf-s=10%29 ALIGN=MIDDLE  ALT=\"system%28f%2Bs=70%2Cf-s=10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > . </SPAN>\n" );
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