document.write( "Question 1207696: What is Alicia's average speed on her walk to school if she walks halfway at 2 mph and runs the rest of the
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document.write( "way at 7 mph?
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Algebra.Com's Answer #845708 by Edwin McCravy(20056)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "Let's pick a ridiculous distance to school, one that halfway is divisible\r\n" ); document.write( "by both 2 and 7. Halfway would be 14 miles and the whole distance to school\r\n" ); document.write( "would be 28 miles.\r\n" ); document.write( "\r\n" ); document.write( "(Yes, I know that's a long way to walk and run to school! lol). Anyway,\r\n" ); document.write( "\r\n" ); document.write( "She walks the first 14 miles at 2 mph, which takes her 7 hours.\r\n" ); document.write( "\r\n" ); document.write( "She runs the remaining 14 miles at 7 mph in 2 hours.\r\n" ); document.write( "\r\n" ); document.write( "So she travels 28 miles in 9 hours.\r\n" ); document.write( "\r\n" ); document.write( "So her average speed is 28/9 = 3 1/9 mph.\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |