document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=259924>Question 259924</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jan rollerskated to Cindy’s house against a strong headwind. She got there in 20 minutes. When she went back home, the tail wind strength was the same as before. That trip took only 8 minutes. How long would it take Jan to ride to her Cindy’s house if there was no wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #191471 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=191471\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jan rollerskated to Cindy’s house against a strong headwind.<BR>\n" );
document.write( " She got there in 20 minutes. <BR>\n" );
document.write( "When she went back home, the tail wind strength was the same as before.<BR>\n" );
document.write( " That trip took only 8 minutes. <BR>\n" );
document.write( "How long would it take Jan to ride to her Cindy’s house if there was no wind?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let s = her speed with no wind<BR>\n" );
document.write( "Let w = the force of the wind<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(s-w) = her speed against the wind<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(s+w) = her speed with the wind<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Choose a convenient number for the distance, 40 units<BR>\n" );
document.write( ":<BR>\n" );
document.write( "write two distance equations, time * speed = distance<BR>\n" );
document.write( "20(s-w) = 40<BR>\n" );
document.write( "8(s+w) = 40<BR>\n" );
document.write( "Simplify, divide the 1st equation by 20, the 2nd equation by 8<BR>\n" );
document.write( "s - w = 2<BR>\n" );
document.write( "s + w = 5<BR>\n" );
document.write( "----------addition eliminates w<BR>\n" );
document.write( "2s = 7<BR>\n" );
document.write( "s = 7/2<BR>\n" );
document.write( "s = 3.5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Find the time at this speed: <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F3.5 ALIGN=MIDDLE  ALT=\"40%2F3.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 11.43 min with no wind<BR>\n" );
document.write( ";<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Prove this find the times of each situation<BR>\n" );
document.write( "When her speed is 3.5 the wind = 1.5<BR>\n" );
document.write( ": <BR>\n" );
document.write( "against: 40/(3.5-1.5) = 20 min<BR>\n" );
document.write( "with:  40/(3.5+1.5) = 8 min \r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
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