document.write( "Question 520542: Rosita can wax her car in 1hr(s). When she works together with Debbie, they can wax the car in 15 min(s). How long would it take Debbie, working by herself, to wax the car? Hint: convert hours to minutes. \n" ); document.write( "
Algebra.Com's Answer #346104 by edjones(8007)![]() ![]() You can put this solution on YOUR website! Rosita can do 1/60 job in 1 min. \n" ); document.write( "d=minutes it takes Debbie to do the job. Debbie can do 1/d the job in 1 min. \n" ); document.write( "Together they can do 1/15 the job in 1 min. \n" ); document.write( "1/60 + 1/d = 1/15 \n" ); document.write( "d+60=4d Multiply by 60d. \n" ); document.write( "3d=60 \n" ); document.write( "d=20 min \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " \n" ); document.write( " |