document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=449750>Question 449750</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One day, you are rollerblading on a trail while it is windy. You travel<BR>\n" );
document.write( "along the trail, turn around and come back to your starting point. On your way out<BR>\n" );
document.write( "on the trail, you are rollerblading against the wind. On your return trip, which is the<BR>\n" );
document.write( "same distance, you are rollerblading with the wind. You can only travel 3 miles an<BR>\n" );
document.write( "hour against the wind, which is blowing at a constant speed. You travel 8 miles an<BR>\n" );
document.write( "hour with the wind. Use the models below to write and solve a system of equations<BR>\n" );
document.write( "to find the average speed when there is no wind and the speed of the wind.\r<BR>\n" );
document.write( "\n" );
document.write( "Against the wind: Your speed with no wind - Speed of wind = Your speed<BR>\n" );
document.write( "With the wind: Your speed with no wind + Speed of wind = Your speed </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #309356 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=309356\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> On your way out on the trail, you are rollerblading against the wind.<BR>\n" );
document.write( " On your return trip, which is the same distance, you are rollerblading with the wind.<BR>\n" );
document.write( " You can only travel 3 miles an hour against the wind, which is blowing at a constant speed. <BR>\n" );
document.write( "You travel 8 miles an hour with the wind. <BR>\n" );
document.write( ":<BR>\n" );
document.write( "Seems like they are making this more complicated than necessary<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let s = speed with no wind<BR>\n" );
document.write( "Let w = speed of the wind<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Write an equation with the wind and an equation against the wind<BR>\n" );
document.write( "s + w = 8<BR>\n" );
document.write( "s - w = 3<BR>\n" );
document.write( "---------------add these two equation, eliminates w, find s<BR>\n" );
document.write( "2s + 0 = 11<BR>\n" );
document.write( "2s = 11<BR>\n" );
document.write( "s = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=11%2F2 ALIGN=MIDDLE  ALT=\"11%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "s = 5.5 mph when there is no wind<BR>\n" );
document.write( "then<BR>\n" );
document.write( "5.5 + w = 8<BR>\n" );
document.write( "w = 8 - 5.5<BR>\n" );
document.write( "w = 2.5 mph is the wind<BR>\n" );
document.write( "therefore<BR>\n" );
document.write( "5.5 + 2.5 = 8 mph with the wind<BR>\n" );
document.write( "and<BR>\n" );
document.write( "5.5 - 2.5 = 3 mph against<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );