document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163114>Question 1163114</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jennifer drove 300 miles to see her friend. On the return trip, she drove 10 mph faster, so she made the return trip in 1 hour less time. What was her speed on the way to friend's home. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #787096 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=787096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "You should certainly know how to set up and solve this problem using formal algebra, as shown by the other tutors.<br><BR>\n" );
document.write( "However, if getting the answer as fast as possible (for example, on a timed test) is important, and a formal algebraic solution is not required, then a bit of mental arithmetic can get you there in almost no time.<br><BR>\n" );
document.write( "The \"nice\" numbers in this problem make a quick mental solution easy.<br><BR>\n" );
document.write( "Considering different combinations of reasonable speeds and driving times that produce a 300 mile trip, you should be able to quickly come up with 5 hours at 60mph and 6 hours at 50mph.<br><BR>\n" );
document.write( "And since those numbers satisfy the condition of the problem (10mph faster --> 1 hour less), they provide the answer to the problem.<br><BR>\n" );
document.write( "ANSWER: Her speed on the way was 50mph.<br><BR>\n" );
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