document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=497136>Question 497136</A>: <I><SPAN STYLE=\"word-break: break-all;\">    \r<BR>\n" );
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document.write( "   Jack and Jill went up the hill at a rate of 8 units per minute.  They came tumbling down at a rate of 8 units per second.  What was their average rate , in units oer minute, for the round trip?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #336685 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=336685\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jack and Jill went up the hill at a rate of 8 units per minute. <BR>\n" );
document.write( "They came tumbling down at a rate of 8 units per second.<BR>\n" );
document.write( " What was their average rate, in units per minute, for the round trip?<BR>\n" );
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document.write( "Find the tumbling down rate in units/min <BR>\n" );
document.write( "8*60 = 480 units per minute<BR>\n" );
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document.write( "Let d = the one-way distance<BR>\n" );
document.write( "Let a = average units/min for the round trip (2d)<BR>\n" );
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document.write( "Write a time equation; time = dist/rate<BR>\n" );
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document.write( "Up time + tumble down time = total time<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F8 ALIGN=MIDDLE  ALT=\"d%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F480 ALIGN=MIDDLE  ALT=\"d%2F480\"   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" );
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document.write( "multiply by 480a, results<BR>\n" );
document.write( "60ad + ad = 960d<BR>\n" );
document.write( "61ad = 960d<BR>\n" );
document.write( "we don't care about d, divide thru by d, to eliminate it.<BR>\n" );
document.write( " 61a = 960<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=960%2F61 ALIGN=MIDDLE  ALT=\"960%2F61\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 15.738 units/minute average rate<BR>\n" );
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document.write( "Confirm this, let the one way dist = 1, find the times<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F480%29 ALIGN=MIDDLE  ALT=\"1%2F480%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F15.738%29 ALIGN=MIDDLE  ALT=\"2%2F15.738%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "use decimals here<BR>\n" );
document.write( ".125 + .002 = .127, confirms our average speed of 15.738 units/min </SPAN>\n" );
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