document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=500351>Question 500351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to know the formula to get this answer. \r<BR>\n" );
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document.write( "Mike drove uphill to his school and it took 3 hours. He returned downhill only going 5mph faster and made it in two hours. What is the average rate of speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #338127 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=338127\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mike drove uphill to his school and it took 3 hours.<BR>\n" );
document.write( " He returned downhill only going 5 mph faster and made it in two hours.<BR>\n" );
document.write( " What is the average rate of speed?<BR>\n" );
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document.write( "Find the one-way distance first<BR>\n" );
document.write( "let d = the one-way distance<BR>\n" );
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document.write( "Write a speed equation; speed = dist/time<BR>\n" );
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document.write( "up speed + 5 mph = down speed<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F3 ALIGN=MIDDLE  ALT=\"d%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 5 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F2 ALIGN=MIDDLE  ALT=\"d%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply by 6, to clear the denominators<BR>\n" );
document.write( "2d + 6(5) = 3d<BR>\n" );
document.write( "30 = 3d - 2d<BR>\n" );
document.write( "d = 30 mi one way<BR>\n" );
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document.write( "Find the average speed for the round trip (60 mi)<BR>\n" );
document.write( "Total time for the round trip: 2 + 3 = 5 hrs<BR>\n" );
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document.write( "write a speed equation, speed = dist/time<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2F5 ALIGN=MIDDLE  ALT=\"60%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 12 mph is the average speed for the round trip </SPAN>\n" );
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