document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=203796>Question 203796</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A girl walked 1/3 of the way at 3 mph and got a car ride the rest of the way at 30 mph. What was her average speed? </SPAN>\n" );
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document.write( "D =  RT\r<BR>\n" );
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document.write( "Let the distance the girl traveled be d. Since her rate of speed is 3 mph, then for the first <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the journey, her time to cover “d” distance is:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F3%2Ad%29+%2F3 ALIGN=MIDDLE  ALT=\"%281%2F3%2Ad%29+%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28d%2F3%29%2A%281%2F3%29 ALIGN=MIDDLE  ALT=\"%28d%2F3%29%2A%281%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F9 ALIGN=MIDDLE  ALT=\"d%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since her rate of speed for the rest of the journey, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > is 30 mph, then for the rest of the journey, her time to cover that distance is:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2F3%2Ad%29+%2F30 ALIGN=MIDDLE  ALT=\"%282%2F3%2Ad%29+%2F30\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282d%2F3%29%2A%281%2F30%29 ALIGN=MIDDLE  ALT=\"%282d%2F3%29%2A%281%2F30%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F45%29 ALIGN=MIDDLE  ALT=\"d%2F45%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. The total time she took for the entire journey is therefore <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28d%2F9%29%2B%28d%2F45%29%29 ALIGN=MIDDLE  ALT=\"%28d%2F9%29%2B%28d%2F45%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6d%2F45 ALIGN=MIDDLE  ALT=\"6d%2F45\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2d%2F15 ALIGN=MIDDLE  ALT=\"2d%2F15\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since her total time to cover the entire distance is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2d%2F15 ALIGN=MIDDLE  ALT=\"2d%2F15\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and since her total journey = “d,” then her average speed = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F%282d%2F15%29 ALIGN=MIDDLE  ALT=\"d%2F%282d%2F15%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F2 ALIGN=MIDDLE  ALT=\"15%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%287.5%29 ALIGN=MIDDLE  ALT=\"highlight_green%287.5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph.<BR>\n" );
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