document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=495304>Question 495304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Danielle drives from her home to the store at an average speed of 40 miles per hour. She  returns home along the same route at an average speed of 60 miles per hour. What is her average speed, in miles per hour, for the entire trip The way the book explained how they got 48 im confused  would some one break this problem down word from word for me </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #336050 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=336050\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Danielle drives from her home to the store at an average speed of 40 miles per hour.<BR>\n" );
document.write( " She returns home along the same route at an average speed of 60 miles per hour.<BR>\n" );
document.write( " What is her average speed, in miles per hour, for the entire trip?<BR>\n" );
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document.write( "Here is one way that is pretty easy to understand<BR>\n" );
document.write( "Let a = average speed for the entire trip<BR>\n" );
document.write( "Let d = the one-way distance<BR>\n" );
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document.write( "Write a time equation, time = dist/speed<BR>\n" );
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document.write( "to store time + return time = total time<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F40 ALIGN=MIDDLE  ALT=\"d%2F40\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F60 ALIGN=MIDDLE  ALT=\"d%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282d%29%2Fa ALIGN=MIDDLE  ALT=\"%282d%29%2Fa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply by 120a to get rid of the denominators, results<BR>\n" );
document.write( "3ad + 2ad = 120(2d)<BR>\n" );
document.write( "5ad = 240d<BR>\n" );
document.write( "we don't need d, divide both sides by d, leaving us with<BR>\n" );
document.write( "5d = 240<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=240%2F5 ALIGN=MIDDLE  ALT=\"240%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 48 mph, <BR>\n" );
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document.write( "How about this? Did it make sense to you? </SPAN>\n" );
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