document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=404731>Question 404731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> points A and B are 70 km apart on a highway. a car starts from A and another car starts from B at the same time. If they travel in the same direction, they meet in 7 hours, but they travel in opposite direction they meet in one hour. what are their speeds </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #286021 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=286021\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need equations for each car going in the same direction and<BR>\n" );
document.write( "equations for each car going in the opposite direction<BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( " A and B going in the same direction:<BR>\n" );
document.write( "(1)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+=+r%5BA%5D%2At%5BA%5D ALIGN=MIDDLE  ALT=\"d%5BA%5D+=+r%5BA%5D%2At%5BA%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+=+r%5BA%5D%2A7 ALIGN=MIDDLE  ALT=\"d%5BA%5D+=+r%5BA%5D%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "(2)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BB%5D+=+r%5BB%5D%2At%5BB%5D ALIGN=MIDDLE  ALT=\"d%5BB%5D+=+r%5BB%5D%2At%5BB%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+%2B+70+=+r%5BB%5D%2A7 ALIGN=MIDDLE  ALT=\"d%5BA%5D+%2B+70+=+r%5BB%5D%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "A and B going in opposite directions:<BR>\n" );
document.write( "(3)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BC%5D+=+r%5BA%5D%2At%5BC%5D ALIGN=MIDDLE  ALT=\"d%5BC%5D+=+r%5BA%5D%2At%5BC%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BC%5D+=+r%5BA%5D%2A1 ALIGN=MIDDLE  ALT=\"d%5BC%5D+=+r%5BA%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "(4)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BE%5D+=+r%5BB%5D%2At%5BB%5D ALIGN=MIDDLE  ALT=\"d%5BE%5D+=+r%5BB%5D%2At%5BB%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70+-+d%5BC%5D+=+r%5BB%5D%2A1 ALIGN=MIDDLE  ALT=\"70+-+d%5BC%5D+=+r%5BB%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------<BR>\n" );
document.write( " A and B going in the same direction:<BR>\n" );
document.write( "Subtract (1) from (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+%2B+70+=+r%5BB%5D%2A7 ALIGN=MIDDLE  ALT=\"d%5BA%5D+%2B+70+=+r%5BB%5D%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-d%5BA%5D+=+-r%5BA%5D%2A7 ALIGN=MIDDLE  ALT=\"-d%5BA%5D+=+-r%5BA%5D%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70+=+7r%5BB%5D+-+7r%5BA%5D ALIGN=MIDDLE  ALT=\"70+=+7r%5BB%5D+-+7r%5BA%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-+r%5BA%5D+%2B+r%5BB%5D+=+10 ALIGN=MIDDLE  ALT=\"-+r%5BA%5D+%2B+r%5BB%5D+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "A and B going in opposite directions:<BR>\n" );
document.write( "Add (3) and (4)<BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BC%5D+=+r%5BA%5D%2A1 ALIGN=MIDDLE  ALT=\"d%5BC%5D+=+r%5BA%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(4) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70+-+d%5BC%5D+=+r%5BB%5D%2A1 ALIGN=MIDDLE  ALT=\"70+-+d%5BC%5D+=+r%5BB%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5BA%5D+%2B+r%5BB%5D+=+70 ALIGN=MIDDLE  ALT=\"+r%5BA%5D+%2B+r%5BB%5D+=+70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Add the results:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-+r%5BA%5D+%2B+r%5BB%5D+=+10 ALIGN=MIDDLE  ALT=\"-+r%5BA%5D+%2B+r%5BB%5D+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5BA%5D+%2B+r%5BB%5D+=+70 ALIGN=MIDDLE  ALT=\"+r%5BA%5D+%2B+r%5BB%5D+=+70\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2r%5BB%5D+=+80 ALIGN=MIDDLE  ALT=\"2r%5BB%5D+=+80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5BB%5D+=+40 ALIGN=MIDDLE  ALT=\"r%5BB%5D+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and, since<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-+r%5BA%5D+%2B+r%5BB%5D+=+10 ALIGN=MIDDLE  ALT=\"-+r%5BA%5D+%2B+r%5BB%5D+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-+r%5BA%5D+%2B+40+=+10 ALIGN=MIDDLE  ALT=\"-+r%5BA%5D+%2B+40+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5BA%5D+=+30 ALIGN=MIDDLE  ALT=\"r%5BA%5D+=+30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The speed of A is 30 km/hr<BR>\n" );
document.write( "The speed of B is 40 km/hr<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+%2B+70+=+r%5BB%5D%2A7 ALIGN=MIDDLE  ALT=\"d%5BA%5D+%2B+70+=+r%5BB%5D%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+%2B+70+=+40%2A7 ALIGN=MIDDLE  ALT=\"d%5BA%5D+%2B+70+=+40%2A7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+=+280+-+70 ALIGN=MIDDLE  ALT=\"d%5BA%5D+=+280+-+70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BA%5D+=+210 ALIGN=MIDDLE  ALT=\"d%5BA%5D+=+210\"   DISABLED_style= \"max-width:90%; height:auto;\" > km<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BB%5D+=+d%5BA%5D+%2B+70 ALIGN=MIDDLE  ALT=\"d%5BB%5D+=+d%5BA%5D+%2B+70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5BB%5D+=+280 ALIGN=MIDDLE  ALT=\"b%5BB%5D+=+280\"   DISABLED_style= \"max-width:90%; height:auto;\" > km<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BC%5D+=+r%5BA%5D%2A1 ALIGN=MIDDLE  ALT=\"d%5BC%5D+=+r%5BA%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5BC%5D+=+30 ALIGN=MIDDLE  ALT=\"d%5BC%5D+=+30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70+-+d%5BC%5D+=+r%5BB%5D%2A1 ALIGN=MIDDLE  ALT=\"70+-+d%5BC%5D+=+r%5BB%5D%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70+-+30+=+40%2A1 ALIGN=MIDDLE  ALT=\"70+-+30+=+40%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40+=+40 ALIGN=MIDDLE  ALT=\"40+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );