document.write( "Question 346078: Jack usually mows his lawn in 5 hours. Mary can mow the same yard in 3 hours. how much time would it take for them to mow the lawn together? they could mow the lawn in ???? \n" ); document.write( "
Algebra.Com's Answer #247461 by stanbon(75887)\"\" \"About 
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Jack usually mows his lawn in 5 hours. Mary can mow the same yard in 3 hours. how much time would it take for them to mow the lawn together? they could mow the lawn in ????
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\n" ); document.write( "Jack rate: 1/5 job/hr
\n" ); document.write( "Mary rate: 1/3 job/hr
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\n" ); document.write( "Together rate: 1/x job/hr
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\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/5 + 1/3 = 1/x
\n" ); document.write( "----
\n" ); document.write( "3x + 5x = 15
\n" ); document.write( "8x = 15
\n" ); document.write( "x = 15/8 = 1 7/8 hr
\n" ); document.write( "---
\n" ); document.write( "1 7/8 hr = 1hr (7/8)60 min = 1hr 52.5 minutes (time together)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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