document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=414764>Question 414764</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On a 600-mile trip, the traveler traveled 50 miles per hour for the first 1/3 of the trip and at 40 miles per hour for the rest of the trip.  What was the traveled average speed for the entire trip?  \r<BR>\n" );
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document.write( "The answer is supposed to be 300/7 mph, but I don't know how to get that.  Can someone please help?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290908 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=290908\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average speed is always (total distance traveled)/(time to travel that distance)<BR>\n" );
document.write( "A common mistake is to take an average of 2 averages, which gives the wrong answer.<BR>\n" );
document.write( "The 1st 1/3 of the trip is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F3%29%2A600+=+200 ALIGN=MIDDLE  ALT=\"%281%2F3%29%2A600+=+200\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200+=+50%2At%5B1%5D ALIGN=MIDDLE  ALT=\"200+=+50%2At%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B1%5D+=+4 ALIGN=MIDDLE  ALT=\"t%5B1%5D+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "The rest of the trip is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3%29%2A600+=+400 ALIGN=MIDDLE  ALT=\"2%2F3%29%2A600+=+400\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=400+=+40%2At%5B2%5D ALIGN=MIDDLE  ALT=\"400+=+40%2At%5B2%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B2%5D+=+10 ALIGN=MIDDLE  ALT=\"t%5B2%5D+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs<BR>\n" );
document.write( "------------<BR>\n" );
document.write( " (total distance traveled)/(time to travel that distance) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600%2F%284+%2B+10%29 ALIGN=MIDDLE  ALT=\"600%2F%284+%2B+10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600%2F14+=+300%2F7 ALIGN=MIDDLE  ALT=\"600%2F14+=+300%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr </SPAN>\n" );
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