document.write( "Question 1115132: Mary can walk 4 mph and Judy can bike 10 mph. If they start at the same point and travel in the same direction, how long will it take Mary to be 8 miles behind Judy?
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Algebra.Com's Answer #730043 by stanbon(75887)\"\" \"About 
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Mary can walk 4 mph and Judy can bike 10 mph. If they start at the same point and travel in the same direction, how long will it take Mary to be 8 miles behind Judy?
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\n" ); document.write( "Mary DATA:
\n" ); document.write( "rate = 4 mph ; dist = x miles ; time = x/4 hrs
\n" ); document.write( "Judy DATA:
\n" ); document.write( "rate = 10 mph ; dist = x+8 miles ; time = (x+8)/10 hrs
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\n" ); document.write( "Equation:
\n" ); document.write( "time = time
\n" ); document.write( "x/4 = (x+8)/10
\n" ); document.write( "10x = 4x + 32
\n" ); document.write( "6x = 32
\n" ); document.write( "x = 16/3 miles
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\n" ); document.write( "Ans: time = x/4 = (16/3)/4 = 4/3 hr = 1 hr 20 min
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\n" ); document.write( "Cheers,
\n" ); document.write( "stan H.
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