document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1008924>Question 1008924</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sped of the current in the Mississippi River is 5mph. A boat travels downstream 26 miles and returns in a total of 32/3 hours. What is the speed of the boat in still water.\r<BR>\n" );
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document.write( "Any help is desperately needed as soon as possible. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #624522 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=624522\">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;\" > = the speed of the boat in still water<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+5+ ALIGN=MIDDLE  ALT=\"+s+%2B+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the boat going downstream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+5+ ALIGN=MIDDLE  ALT=\"+s+-+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the speed of the boat going upstream<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 hrs for the boat to go downstream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11%2F3+-+t+ ALIGN=MIDDLE  ALT=\"+11%2F3+-+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in hrs for the boat to go upstream\r<BR>\n" );
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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=+26+=+%28+s%2B5+%29%2At+ ALIGN=MIDDLE  ALT=\"+26+=+%28+s%2B5+%29%2At+\"   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=+26+=+%28+s-5+%29%2A%28+11%2F3+-+t+%29+ ALIGN=MIDDLE  ALT=\"+26+=+%28+s-5+%29%2A%28+11%2F3+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%2811%2F3%29%2As+-+55%2F3+-+s%2At+%2B+5t+ ALIGN=MIDDLE  ALT=\"+26+=+%2811%2F3%29%2As+-+55%2F3+-+s%2At+%2B+5t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%2811%2F3%29%2As+-+55%2F3+-+%28+s+-+5+%29%2At+ ALIGN=MIDDLE  ALT=\"+26+=+%2811%2F3%29%2As+-+55%2F3+-+%28+s+-+5+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+26%2F+%28+s%2B5+%29+ ALIGN=MIDDLE  ALT=\"+t+=+26%2F+%28+s%2B5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "By substitution:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%2811%2F3%29%2As+-+55%2F3+-+%28+s+-+5+%29%2A%28+26%2F%28+s%2B5+%29+%29+ ALIGN=MIDDLE  ALT=\"+26+=+%2811%2F3%29%2As+-+55%2F3+-+%28+s+-+5+%29%2A%28+26%2F%28+s%2B5+%29+%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=+3%2A+%28+s+%2B+5+%29+ ALIGN=MIDDLE  ALT=\"+3%2A+%28+s+%2B+5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+78%2A%28+s%2B5+%29+=+11s%2A%28+s%2B5+%29+-+55%2A%28+s%2B5+%29+-78%2A%28+s-5+%29+ ALIGN=MIDDLE  ALT=\"+78%2A%28+s%2B5+%29+=+11s%2A%28+s%2B5+%29+-+55%2A%28+s%2B5+%29+-78%2A%28+s-5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+78s+%2B+390+=+11s%5E2+%2B+55s+-+55s+-+275+-+78s+%2B+390+ ALIGN=MIDDLE  ALT=\"+78s+%2B+390+=+11s%5E2+%2B+55s+-+55s+-+275+-+78s+%2B+390+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11s%5E2+-+156s+-+275+=+0+ ALIGN=MIDDLE  ALT=\"+11s%5E2+-+156s+-+275+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use quadratic formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+%28+-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"+s+=+%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+=+11+ ALIGN=MIDDLE  ALT=\"+a+=+11+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+-156+ ALIGN=MIDDLE  ALT=\"+b+=+-156+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+-275+ ALIGN=MIDDLE  ALT=\"+c+=+-275+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+%28+-%28-156%29+%2B-+sqrt%28+%28-156%29%5E2+-+4%2A11%2A%28-275%29+%29%29+%2F+%282%2A11%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+%28+156+%2B-+sqrt%28+24336+%2B+12100+%29%29+%2F+22+ ALIGN=MIDDLE  ALT=\"+s+=+%28+156+%2B-+sqrt%28+24336+%2B+12100+%29%29+%2F+22+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+%28+156+%2B-+sqrt%28+36436+%29%29+%2F+22+ ALIGN=MIDDLE  ALT=\"+s+=+%28+156+%2B-+sqrt%28+36436+%29%29+%2F+22+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+%28+156+%2B+190.882+%29+%2F+22+ ALIGN=MIDDLE  ALT=\"+s+=+%28+156+%2B+190.882+%29+%2F+22+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+15.767+ ALIGN=MIDDLE  ALT=\"+s+=+15.767+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "The speed of the boat in still water is 15.767 mi/hr<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%28+s%2B5+%29%2At+ ALIGN=MIDDLE  ALT=\"+26+=+%28+s%2B5+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%28+15.767%2B5+%29%2At+ ALIGN=MIDDLE  ALT=\"+26+=+%28+15.767%2B5+%29%2At+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+20.767t+ ALIGN=MIDDLE  ALT=\"+26+=+20.767t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+1.252+ ALIGN=MIDDLE  ALT=\"+t+=+1.252+\"   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=+26+=+%28+s-5+%29%2A%28+11%2F3+-+t+%29+ ALIGN=MIDDLE  ALT=\"+26+=+%28+s-5+%29%2A%28+11%2F3+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+26+=+%28+15.767-5+%29%2A%28+11%2F3+-+t+%29+ ALIGN=MIDDLE  ALT=\"+26+=+%28+15.767-5+%29%2A%28+11%2F3+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11%2F3+-+t+=+26%2F10.767+ ALIGN=MIDDLE  ALT=\"+11%2F3+-+t+=+26%2F10.767+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3.667+-+t+=+2.415+ ALIGN=MIDDLE  ALT=\"+3.667+-+t+=+2.415+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+1.252+ ALIGN=MIDDLE  ALT=\"+t+=+1.252+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "This seems to check out -you could still get<BR>\n" );
document.write( "another opinion, but I think my method is OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );