document.write( "Question 1025653: zoe can rake her yard in 4 hours. stan can do the same job in only 3 hours. how long would it take zoe and stand to rake the yard if they worked together? \n" ); document.write( "
Algebra.Com's Answer #640952 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! zoe can rake her yard in 4 hours. stan can do the same job in only 3 hours. how long would it take zoe and stand to rake the yard if they worked together? \n" ); document.write( "------- \n" ); document.write( "zoe rate:: 1/4 job/hr \n" ); document.write( "--- \n" ); document.write( "stan rate:: 1/3 job/hr \n" ); document.write( "---- \n" ); document.write( "together rate:: 1/x job/hr \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1/4 + 1/3 = 1/x \n" ); document.write( "3x + 4x = 4*3 \n" ); document.write( "7x = 12 \n" ); document.write( "x = 12/7 = 1.71 hrs = 1hr 0.71*60 min = 1hr 42sec (time to do the job together) \n" ); document.write( "------ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |