document.write( "Question 243397: Three people run a mile. The first person runs the mile in seven minutes. The second person takes 5/4 as long as the first person. How many minutes did it take the third person to run the mile if the average for all three people is eight minutes?\r
\n" ); document.write( "\n" ); document.write( "A. 8 B. 8.25 C. 8.5 D. 9 E. 11.4
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Algebra.Com's Answer #178365 by ankor@dixie-net.com(22740)\"\" \"About 
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Three people run a mile. The first person runs the mile in seven minutes.
\n" ); document.write( " The second person takes 5/4 as long as the first person.
\n" ); document.write( "How many minutes did it take the third person to run the mile if the average for all three people is eight minutes?
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\n" ); document.write( "Let t = time of the 3rd person
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\n" ); document.write( "Change 5/4 to 1.25
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\n" ); document.write( "\"%287+%2B+1.25%287%29+%2B+t%29%2F3\" = 8
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\n" ); document.write( "\"%287+%2B+8.75+%2B+t%29%2F3\" = 8
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\n" ); document.write( "\"%2815.75+%2B+t%29%2F3\" = 8
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\n" ); document.write( "Multiply both sides by 3
\n" ); document.write( "15.75 + t = 24
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\n" ); document.write( "t = 24 - 15.75
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\n" ); document.write( "t = 8.25 min is the 3rd person's time
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\n" ); document.write( "Check solution
\n" ); document.write( "\"%287+%2B+8.75+%2B+8.25%29%2F3\" = 8
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