document.write( "Question 922631: if coleen were to paint her living room alone,it would take 8 hours.her sister fran could do the job in 9 hours. how long would it take them working together? \n" ); document.write( "
Algebra.Com's Answer #559682 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! if coleen were to paint her living room alone,it would take 8 hours.her sister fran could do the job in 9 hours. how long would it take them working together? \n" ); document.write( "*** \n" ); document.write( "1/8=coleen's work rate \n" ); document.write( "1/9=fran's work rate \n" ); document.write( "let x=length of time it would take to finish the job working together \n" ); document.write( "1/x=their work rate \n" ); document.write( ".. \n" ); document.write( "1/8+1/9=1/x \n" ); document.write( "9/72+8/72=1/x \n" ); document.write( "17/72=1/x \n" ); document.write( "x=72/17≈4.24 \n" ); document.write( "length of time it would take to finish the job working together=4.24 hrs \n" ); document.write( " |