document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=794073>Question 794073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat takes 3 hours longer to go 60 miles up a river than to return. If the boat cruises at 15mph in still water, what is the rate of the current? Also, what level of Algebraic problem solving is this considered?<BR>\n" );
document.write( "Thanks,\r<BR>\n" );
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document.write( "Steve Schrock </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #480560 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=480560\">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=+c+ ALIGN=MIDDLE  ALT=\"+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the rate of the current<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15+-+c+ ALIGN=MIDDLE  ALT=\"+15+-+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = rate going upriver<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15+%2B+c+ ALIGN=MIDDLE  ALT=\"+15+%2B+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = rate going downriver<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;\" > = time in hours to go downriver<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+%2B+3+ ALIGN=MIDDLE  ALT=\"+t+%2B+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in hours to go upriver<BR>\n" );
document.write( "----------------------------------<BR>\n" );
document.write( "Equation for going upriver:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+60+=+%28+15+-+c+%29%2A%28+t+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+60+=+%28+15+-+c+%29%2A%28+t+%2B+3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation for going downriver:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+60+=+%28+15+%2B+c+%29%2At+ ALIGN=MIDDLE  ALT=\"+60+=+%28+15+%2B+c+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+60+=+15t+-+c%2At+%2B+45+-+3c+ ALIGN=MIDDLE  ALT=\"+60+=+15t+-+c%2At+%2B+45+-+3c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15+=+15t+-+c%2A%28+t+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+15+=+15t+-+c%2A%28+t+%2B+3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c%2A%28+t+%2B+3+%29+=+15%2A%28+1+-+t+%29+ ALIGN=MIDDLE  ALT=\"+c%2A%28+t+%2B+3+%29+=+15%2A%28+1+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+15%2A%28+1+-+t+%29+%2F+%28+t+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+c+=+15%2A%28+1+-+t+%29+%2F+%28+t+%2B+3+%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=+60+=+15t+%2B+c%2At+ ALIGN=MIDDLE  ALT=\"+60+=+15t+%2B+c%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+%28+60t+-+15+%29+%2F+t+ ALIGN=MIDDLE  ALT=\"+c+=+%28+60t+-+15+%29+%2F+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+15%2A%28+4t+-+1+%29+%2F+t+ ALIGN=MIDDLE  ALT=\"+c+=+15%2A%28+4t+-+1+%29+%2F+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "by substitution:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15%2A%28+4t+-+1+%29+%2F+t+=+15%2A%28+1+-+t+%29+%2F+%28+t+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+15%2A%28+4t+-+1+%29+%2F+t+=+15%2A%28+1+-+t+%29+%2F+%28+t+%2B+3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+4t+-+1+%29+%2F+t+=+%28+1+-+t+%29+%2F+%28+t+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+%28+4t+-+1+%29+%2F+t+=+%28+1+-+t+%29+%2F+%28+t+%2B+3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%2A%28+t%2B3+%29+ ALIGN=MIDDLE  ALT=\"+t%2A%28+t%2B3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+4t+-+1+%29%2A%28+t+%2B+3+%29+=+t%2A%28+-t+%2B+1+%29+ ALIGN=MIDDLE  ALT=\"+%28+4t+-+1+%29%2A%28+t+%2B+3+%29+=+t%2A%28+-t+%2B+1+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t%5E2+-+t+%2B+12t+-+3++=+-t%5E2+%2B+t+ ALIGN=MIDDLE  ALT=\"+4t%5E2+-+t+%2B+12t+-+3++=+-t%5E2+%2B+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5t%5E2+%2B+10t+-+3+=+0+ ALIGN=MIDDLE  ALT=\"+5t%5E2+%2B+10t+-+3+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use the quadratic equation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+=+5+ ALIGN=MIDDLE  ALT=\"+a+=+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+10+ ALIGN=MIDDLE  ALT=\"+b+=+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+-3+ ALIGN=MIDDLE  ALT=\"+c+=+-3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-10+%2B-+sqrt%28+10%5E2-4%2A5%2A%28-3%29+%29%29%2F%282%2A5%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-10+%2B-+sqrt%28+10%5E2-4%2A5%2A%28-3%29+%29%29%2F%282%2A5%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-10+%2B-+sqrt%28+100+%2B+60+%29%29+%2F+10+ ALIGN=MIDDLE  ALT=\"+t+=+%28-10+%2B-+sqrt%28+100+%2B+60+%29%29+%2F+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-10+%2B-+sqrt%28+160+%29%29+%2F+10+ ALIGN=MIDDLE  ALT=\"+t+=+%28-10+%2B-+sqrt%28+160+%29%29+%2F+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28+-10+%2B+4%2Asqrt%28+10+%29+%29%2F10+ ALIGN=MIDDLE  ALT=\"+t+=+%28+-10+%2B+4%2Asqrt%28+10+%29+%29%2F10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+-1+%2B+%282%2F5%29%2Asqrt%2810%29+ ALIGN=MIDDLE  ALT=\"+t+=+-1+%2B+%282%2F5%29%2Asqrt%2810%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You can finish this. Find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+ ALIGN=MIDDLE  ALT=\"t+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and then plug <BR>\n" );
document.write( "value into (2) to find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+ ALIGN=MIDDLE  ALT=\"+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Hopefully, I didn't make a mistake.\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );