document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1051684>Question 1051684</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a truck with a heavy load drove from boston to New york at a speed of 40 mph. After unloading, it returned from New york to boston at a speed of 60 mph. What was the average speed for the whole trip </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #667134 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=667134\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Average speed = [ total distance ] / [ total time ]<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the one-way distance Boston to NY<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Boston to NY:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B1%5D+=+d%2F40+ ALIGN=MIDDLE  ALT=\"+t%5B1%5D+=+d%2F40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "NY to Boston:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%5B2%5D+=+d%2F60+ ALIGN=MIDDLE  ALT=\"+t%5B2%5D+=+d%2F60+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Average speed  = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2d+%2F+%28+t%5B1%5D+%2B+t%5B2%5D+%29+ ALIGN=MIDDLE  ALT=\"+2d+%2F+%28+t%5B1%5D+%2B+t%5B2%5D+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2d+%2F+%28+d%2F40+%2B+d%2F60+%29+ ALIGN=MIDDLE  ALT=\"+2d+%2F+%28+d%2F40+%2B+d%2F60+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28d%2Fd%29%2A%28+2%2F%28+1%2F40+%2B+1%2F60+%29%29+ ALIGN=MIDDLE  ALT=\"+%28d%2Fd%29%2A%28+2%2F%28+1%2F40+%2B+1%2F60+%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply top and bottom by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+120+ ALIGN=MIDDLE  ALT=\"+120+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+240+%2F+%28+3+%2B+2+%29+ ALIGN=MIDDLE  ALT=\"+240+%2F+%28+3+%2B+2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+240%2F5+=+48+ ALIGN=MIDDLE  ALT=\"+240%2F5+=+48+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "the average speed is 48 mi/hr<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );