document.write( "Question 972801: One person can do a certain job in one-half hour, and another person can do the same job in one hour and ten minutes. How many minutes will they take to do the job together? \n" ); document.write( "
Algebra.Com's Answer #595108 by nerdybill(7384)\"\" \"About 
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One person can do a certain job in one-half hour, and another person can do the same job in one hour and ten minutes. How many minutes will they take to do the job together?
\n" ); document.write( "one-half hour = .5 hours
\n" ); document.write( "one hour and ten minutes = 1+10/60 = 1+1/6 = 7/6 hours
\n" ); document.write( ".
\n" ); document.write( "Let t = time (hours) it takes for both
\n" ); document.write( "then
\n" ); document.write( "t(1/.5 + 1/(7/6)) = 1
\n" ); document.write( "t(1/.5 + 6/7) = 1
\n" ); document.write( "t(1/.5 + 6/7) = 1
\n" ); document.write( "multiply both sides by 3.5
\n" ); document.write( "t(7 + 3) = 3.5
\n" ); document.write( "t(10) = 3.5
\n" ); document.write( "t = .35 hour
\n" ); document.write( "or
\n" ); document.write( "t = .35 *60 = 21 minutes
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