document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=581312>Question 581312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dave and sara live 50 miles apart and travel towards each other on their bikes. Sara leaves on time and dave leaves 2 hours later but tries to make up for it by riding 7 mph faster than sara.Find the speed of both sara and dave on their bikes, if sara is on the bike for 4 hours.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #371555 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=371555\">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=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = Sarah's speed in mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+7+ ALIGN=MIDDLE  ALT=\"+s+%2B+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = Dave's speed in mi/hr<BR>\n" );
document.write( "given:<BR>\n" );
document.write( "Sarah gets a head start of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+2s+ ALIGN=MIDDLE  ALT=\"+d+=+2s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "They are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50+-+2s+ ALIGN=MIDDLE  ALT=\"+50+-+2s+\"   DISABLED_style= \"max-width:90%; height:auto;\" > miles apart when Dave leaves<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Now I can think of Sarah as standing still and <BR>\n" );
document.write( "Dave moving towards her at the sum of their speeds<BR>\n" );
document.write( "If Sarah is on her bike for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4+ ALIGN=MIDDLE  ALT=\"+4+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs, then<BR>\n" );
document.write( "when Dave starts, they both travel for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+ ALIGN=MIDDLE  ALT=\"+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > more hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50+-+2s+=+%28+s+%2B+s+%2B+7+%29%2A2+ ALIGN=MIDDLE  ALT=\"+50+-+2s+=+%28+s+%2B+s+%2B+7+%29%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50+-+2s+=+%28+2s+%2B+7+%29%2A2+ ALIGN=MIDDLE  ALT=\"+50+-+2s+=+%28+2s+%2B+7+%29%2A2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50+-+2s+=+4s+%2B+14+ ALIGN=MIDDLE  ALT=\"+50+-+2s+=+4s+%2B+14+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6s+=+36+ ALIGN=MIDDLE  ALT=\"+6s+=+36+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+6+ ALIGN=MIDDLE  ALT=\"+s+=+6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+7+=+13+ ALIGN=MIDDLE  ALT=\"+s+%2B+7+=+13+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Sarah's speed is 6 mi/hr<BR>\n" );
document.write( "Dave's speed is 13 mi/hr<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "Their separate distances are:<BR>\n" );
document.write( "Dave:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+s+%2B+7%29%2A2+=+13%2A2%0D%0A%7B%7B%7B+13%2A2+=+26+ ALIGN=MIDDLE  ALT=\"+%28+s+%2B+7%29%2A2+=+13%2A2%0D%0A%7B%7B%7B+13%2A2+=+26+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "Sarah:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2s+%2B+s%2A2+=+4s+ ALIGN=MIDDLE  ALT=\"+2s+%2B+s%2A2+=+4s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4s+=+4%2A6+ ALIGN=MIDDLE  ALT=\"+4s+=+4%2A6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A6+=+24+ ALIGN=MIDDLE  ALT=\"+4%2A6+=+24+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+24+%2B+26+=+50+ ALIGN=MIDDLE  ALT=\"+24+%2B+26+=+50+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );