document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=654675>Question 654675</A>: <I><SPAN STYLE=\"word-break: break-all;\"> over a distance a car traveling 40 mph, the car then drives that same distance 10 mph, what is the average mph for the whole trip? i tried working it out but i got stuck at the 2nd stage of the solution so please give me a very detailed solution  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #408840 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=408840\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> over a distance a car traveling 40 mph, <BR>\n" );
document.write( "the car then drives that same distance 10 mph, <BR>\n" );
document.write( "what is the average mph for the whole trip?<BR>\n" );
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document.write( "let d = the distance traveled at 40 mph and the distance traveled at 10 mph<BR>\n" );
document.write( "let a = the average mph for the trip<BR>\n" );
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document.write( "Write a time equation; time = dist/speed<BR>\n" );
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document.write( "40mph time + 10mph 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%2F10 ALIGN=MIDDLE  ALT=\"d%2F10\"   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 40a, to clear the denominators<BR>\n" );
document.write( "40a*<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;\" > + 40a*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F10 ALIGN=MIDDLE  ALT=\"d%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 40a*<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( "Cancel the denominators<BR>\n" );
document.write( "ad + 4ad = 40(2d)<BR>\n" );
document.write( "5ad = 80d<BR>\n" );
document.write( "divide both sides by d<BR>\n" );
document.write( "5a = 80<BR>\n" );
document.write( "a = 80/5<BR>\n" );
document.write( "a = 16 mph is the average for the trip<BR>\n" );
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document.write( "Was this detailed enough for you? C </SPAN>\n" );
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