document.write( "Question 723178: george can install new wiring for a computer in 3 hours. it takes pete 4 hours. how long will ot take if they work together \n" ); document.write( "

Algebra.Com's Answer #443077 by josmiceli(19441) $\"\"$ $\"About$

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Add their rates of working
\n" ); document.write( "( 1 job ) / ( 3 hrs ) + ( 1 job ) / ( 4 hrs ) = ( 1 job ) / ( t hrs )
\n" ); document.write( " $\"+1%2F3+%2B+1%2F4+=+1%2Ft+\"$
\n" ); document.write( "Multiply both sides by $\"+12t+\"$
\n" ); document.write( " $\"+4t+%2B+3t+=+12+\"$
\n" ); document.write( " $\"+7t+=+12+\"$
\n" ); document.write( " $\"+t+=+12%2F7+\"$
\n" ); document.write( " $\"+t+=+1.7143+\"$ hrs
\n" ); document.write( " $\"+.7143%2A60+=+42.86+\"$
\n" ); document.write( "Working together it will take them 1 hr and 43 min
\n" ); document.write( " \n" ); document.write( "

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