document.write( "Question 1129747: The O'Connors own a small janitorial service. John requires 1/4 hour more time to clean the Moose club by himself than Chris does working by herself. If together they can clean the club in 4 hours, find the time required by each to clean the club.\r
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Algebra.Com's Answer #746354 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The O'Connors own a small janitorial service. \n" ); document.write( " John requires 1/4 hour more time to clean the Moose club by himself than Chris does working by herself. \n" ); document.write( " If together they can clean the club in 4 hours, find the time required by each to clean the club. \n" ); document.write( ": \n" ); document.write( "let t = time required by Chris working alone \n" ); document.write( "then \n" ); document.write( "(t+.25) = time required by John \n" ); document.write( "the completed job = 1 \n" ); document.write( ": \n" ); document.write( "Each will do a fraction of the job, the two fractions add up to 1 \n" ); document.write( " \n" ); document.write( "multiply equation by t(t+.25), cancel the denominators \n" ); document.write( "4(t+.25) + 4t = t(t+.25) \n" ); document.write( "4t + 1 + 4t = t^2 + .25t \n" ); document.write( "8t + 1 = t^2 + .25t \n" ); document.write( "arrange as a quadratic equation on the right \n" ); document.write( "0 = t^2 +.25t - 8t - 1 \n" ); document.write( "t^2 - 7.75t - 1 = 0 \n" ); document.write( "use the quadratic formula: a=1; b=-7.75; c=-1 \n" ); document.write( "I got a positive solution of \n" ); document.write( "t = 7.877 hrs Chris alone \n" ); document.write( "and \n" ); document.write( "7.877 + .25 = 8.127 hrs John alone \n" ); document.write( " |