document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1164958>Question 1164958</A>: <I><SPAN STYLE=\"word-break: break-all;\"> qmy drove to a friends house at a rate of 45mph. She returned by the same route at a rate of 50mph. The driving time for the round trip was 4hrs. what is the total distance amy travelled. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #789401 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=789401\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> qmy drove to a friends house at a rate of 45mph. She returned by the same route at a rate of 50mph. The driving time for the round trip was 4hrs. what is the total distance amy travelled.<BR>\n" );
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document.write( "Avg speed of the round trip = 2*45*50/(45+50) = 900/19 mi/hr<BR>\n" );
document.write( "RT distance = r*t = (900/19)*4 = 3600/19 miles<BR>\n" );
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document.write( "It's not possible to remember a formula for everything, but for a round trip:<BR>\n" );
document.write( "Avg speed = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Ar%5B1%5D%2Ar%5B2%5D%2F%28r%5B1%5D%2Ar%5B2%5D%29 ALIGN=MIDDLE  ALT=\"2%2Ar%5B1%5D%2Ar%5B2%5D%2F%28r%5B1%5D%2Ar%5B2%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "is similar to parallel work, parallel resistors, and easy to remember (IMO). </SPAN>\n" );
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