document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1207696>Question 1207696</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is Alicia's average speed on her walk to school if she walks halfway at 2 mph and runs the rest of the<BR>\n" );
document.write( "way at 7 mph?<BR>\n" );
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document.write( "She travels equal distances at the two speeds of 2mph and 7mph.<br><BR>\n" );
document.write( "Since the ratio of speeds is 2:7 and the distances are the same, the ratio of times spent at the two speeds is 7:2.<br><BR>\n" );
document.write( "We can calculate her average speed as a weighted average -- she spends 7/9 of her time at 2mph and 2/9 of her time at 7mph; her average speed is<br><BR>\n" );
document.write( "(7/9)*2+(2/9)*7 = 14/9+14/9 = 28/9<br><BR>\n" );
document.write( "ANSWER: 28/9 mph, or 3 1/9 mph<br><BR>\n" );
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