document.write( "Question 109329: ron takes two hours more than paul to mow the lawn . working togather they can mow the lawn in 5 hrs . how long does it take each of them working alone
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Algebra.Com's Answer #79739 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! ron takes two hours more than paul to mow the lawn . working together they can mow the lawn in 5 hrs . how long does it take each of them working alone> \n" ); document.write( ": \n" ); document.write( "x = number of hrs required by Paul working alone: \n" ); document.write( "Then \n" ); document.write( "(x+2) = number of hrs required by Ron working alone \n" ); document.write( ": \n" ); document.write( "Let the completed job = 1 \n" ); document.write( ": \n" ); document.write( "A simple equation: \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "Multiply equation by x(x+2) to get rid of the denominators: \n" ); document.write( "x(x+2)* \n" ); document.write( ": \n" ); document.write( "Cancel out the denominators: \n" ); document.write( "5(x+2) + 5x = x(x+2) \n" ); document.write( ": \n" ); document.write( "5x + 10 + 5x = x^2 + 2x \n" ); document.write( ": \n" ); document.write( "combine like terms, arrange as a quadratic equation on the left: \n" ); document.write( "x^2 + 2x- 5x - 5x - 10 = 0 \n" ); document.write( ": \n" ); document.write( "x^2 - 8x - 10 = 0 \n" ); document.write( ": \n" ); document.write( "This won't readily factor, solve using the quadratic formula: \n" ); document.write( "a = 1; b = -8; c = -10 \n" ); document.write( ": \n" ); document.write( "I assume you know how to do that; \n" ); document.write( "You should get: \n" ); document.write( "x = 9.1 hrs (Paul's time) \n" ); document.write( " |