document.write( "Question 753358: Write an expression for the sum of the work rates:
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document.write( "Cary and a friend apply one coat of paint in a room in 2.5 hours. Cary's friend paints twice as fast as Cary when they paint separately. \n" );
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Algebra.Com's Answer #458353 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Cary and a friend apply one coat of paint in a room in 2.5 hours. Cary's friend paints twice as fast as Cary when they paint separately. \n" ); document.write( "---- \n" ); document.write( "Together: time = 2.5 hrs/job ; rate = 1/2.5 = 2/5 job/hr \n" ); document.write( "---- \n" ); document.write( "Cary's friend: time = x hr/job ; rate = 1/x job/hr \n" ); document.write( "----- \n" ); document.write( "Cary: time = 2x hr/job ; rate = 1/2x job/hr \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate: \n" ); document.write( "1/x + 1/(2x) = 2/5 \n" ); document.write( "======================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "======================= \n" ); document.write( " |