document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=982496>Question 982496</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, here's my question:\r<BR>\n" );
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document.write( "Charlie rows at a constant speed downstream in the river from Amaroo to Bradden in 3 hours and back upstream in 4 hours. Assume the river flows at a constant rate. Find the number of hours it would take a piece of driftwood to float downstream from Amaroo to Bradden.\r<BR>\n" );
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document.write( "Thank you so so much for your help! :D </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #603332 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=603332\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Charlie has a speed due to his rowing and the current,<BR>\n" );
document.write( "but the driftwood only has speed due to the current<BR>\n" );
document.write( "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;\" > = Charlie's speed without the current<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+ ALIGN=MIDDLE  ALT=\"+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the current<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+c+ ALIGN=MIDDLE  ALT=\"+s+%2B+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = Charlie's speed going downstream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+c+ ALIGN=MIDDLE  ALT=\"+s+-+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = charlie's speed going upstream<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance from Amaroo to Bradden in km<BR>\n" );
document.write( "----------------------------------------------<BR>\n" );
document.write( "Equation for going downstream:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+s+%2B+c+%29%2A3+ ALIGN=MIDDLE  ALT=\"+d+=+%28+s+%2B+c+%29%2A3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for going upstream:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+s+-+c+%29%2A4+ ALIGN=MIDDLE  ALT=\"+d+=+%28+s+-+c+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------------<BR>\n" );
document.write( "Plug (1) into (2)<BR>\n" );
document.write( "(3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+s+%2B+c+%29%2A3+=+%28+s+-+c+%29%2A4+ ALIGN=MIDDLE  ALT=\"+%28+s+%2B+c+%29%2A3+=+%28+s+-+c+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3s+%2B+3c+=+4s+-+4c+ ALIGN=MIDDLE  ALT=\"+3s+%2B+3c+=+4s+-+4c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+7c+ ALIGN=MIDDLE  ALT=\"+s+=+7c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Add (1) and (2)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2d+=+7s+-+c+ ALIGN=MIDDLE  ALT=\"+2d+=+7s+-+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2d+=+7%2A7c+-+c+ ALIGN=MIDDLE  ALT=\"+2d+=+7%2A7c+-+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2d+=+48c+ ALIGN=MIDDLE  ALT=\"+2d+=+48c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+c%2A%28+24+%29+ ALIGN=MIDDLE  ALT=\"+d+=+c%2A%28+24+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "It takes 24 hrs for the driftwood to float downstream<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+s+%2B+c+%29%2A3+ ALIGN=MIDDLE  ALT=\"+d+=+%28+s+%2B+c+%29%2A3+\"   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+=+%28+s+%2B+d%2F24+%29%2A3+ ALIGN=MIDDLE  ALT=\"+d+=+%28+s+%2B+d%2F24+%29%2A3+\"   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+=+3s+%2B+d%2F8+ ALIGN=MIDDLE  ALT=\"+d+=+3s+%2B+d%2F8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%287%2F8%29%2Ad+=+3s+ ALIGN=MIDDLE  ALT=\"+%287%2F8%29%2Ad+=+3s+\"   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+=+s%2A%2824%2F7%29+ ALIGN=MIDDLE  ALT=\"+d+=+s%2A%2824%2F7%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%28+s+-+d%2F24+%29%2A4+ ALIGN=MIDDLE  ALT=\"+d+=+%28+s+-+d%2F24+%29%2A4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+4s+-+d%2F6+ ALIGN=MIDDLE  ALT=\"+d+=+4s+-+d%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%287%2F6%29%2Ad+=+4s+ ALIGN=MIDDLE  ALT=\"+%287%2F6%29%2Ad+=+4s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+%286%2F7%29%2A4s+ ALIGN=MIDDLE  ALT=\"+d+=+%286%2F7%29%2A4s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+s%2A%2824%2F7%29+ ALIGN=MIDDLE  ALT=\"+d+=+s%2A%2824%2F7%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "Hope I got it!<BR>\n" );
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document.write( " </SPAN>\n" );
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