document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=753567>Question 753567</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You drive on Interstate 10 from San Antonio to Houston, half the time at 50 km/h and the other half at 82 km/h. On the way back you travel half the distance at 50 km/h and the other half at 82 km/h.\r<BR>\n" );
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document.write( "What is your average speed for the entire trip? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #458451 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=458451\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Average speed is always ( total distance traveled ) / ( 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;\" > = total distance traveled<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+ ALIGN=MIDDLE  ALT=\"+2t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = total time <BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Half the time is spent traveling at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50+ ALIGN=MIDDLE  ALT=\"+50+\"   DISABLED_style= \"max-width:90%; height:auto;\" > km/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%5B1%5D+=+50t+ ALIGN=MIDDLE  ALT=\"+d%5B1%5D+=+50t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Half the time is spent traveling at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+82+ ALIGN=MIDDLE  ALT=\"+82+\"   DISABLED_style= \"max-width:90%; height:auto;\" > km/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d%5B2%5D+=+82t+ ALIGN=MIDDLE  ALT=\"+d%5B2%5D+=+82t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+d%5B1%5D+%2B+d%5B2%5D+ ALIGN=MIDDLE  ALT=\"+d+=+d%5B1%5D+%2B+d%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=+d+=+50t+%2B+82t+ ALIGN=MIDDLE  ALT=\"+d+=+50t+%2B+82t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The average speed is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+%2F+%28+2t+%29+=+%28+50t+%2B+82t+%29+%2F+%28+2t+%29+ ALIGN=MIDDLE  ALT=\"+d+%2F+%28+2t+%29+=+%28+50t+%2B+82t+%29+%2F+%28+2t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t ALIGN=MIDDLE  ALT=\"t\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s cancel<BR>\n" );
document.write( "Average speed = 132 / 2<BR>\n" );
document.write( "Average speed = 66 km/hr\r<BR>\n" );
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document.write( " </SPAN>\n" );
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