document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=935193>Question 935193</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I cannot come up with what formula to use.  The problem is:  On a 1287 mile long road trip in windy conditions, a family calculates their fuel economy to be 18 miles per gallon over the 2 days it takes to reach their destination.  On their 2 day return trip, with a similar wind at their backs, their calculations show a fuel economy of 26 miles per gallon.  Calculate the expected fuel economy of their vehicle in ideal (non-windy) conditions as well as the influence of the wind (w) in miles per gallon.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #568334 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=568334\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is not a reasonable problem.<BR>\n" );
document.write( "It's easy to find the average, (18 + 26)/2 = 22 mi/gallon.<BR>\n" );
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document.write( "But, wind resistance is a function on the square of the speed, and no speeds were stated, just 1287 miles in 2 days (a lot of glass time, imo).<BR>\n" );
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document.write( "Whatever answer the teacher comes up with should be subjected to serious analysis and criticism. </SPAN>\n" );
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