document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1047809>Question 1047809</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help setting up this problem...<BR>\n" );
document.write( "Sarah has a motorboat that is travelling on a river with a current of 6 mph. The trip upstream takes 4.5 hrs. Also, the return trip downstream takes 4 hours. How fast would Sarah’s boat be going if it were in still water. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #663345 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=663345\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sarah has a motorboat that is travelling on a river with a current of 6 mph. The trip upstream takes 4.5 hrs. Also, the return trip downstream takes 4 hours. How fast would Sarah’s boat be going if it were in still water.<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Upstream DATA:<BR>\n" );
document.write( "time = 4.5 hrs ; rate = b-6  mph ; distance = t*r = 4.5(b-6) miles<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Downstream DATA:<BR>\n" );
document.write( "time = 4 hours ; rate = b+6 mph ; distance = t*r = 4(b+6) miles<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "distance up = distance down<BR>\n" );
document.write( "4.5b - 27 = 4b + 24<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "0.5b = 51<BR>\n" );
document.write( "Boat speed in still water = b = 102 mph<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------------ <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );