document.write( "Question 54537This question is from textbook McDougal Littell Algebra 1 concepts and skills
\n" ); document.write( ": i do not understand how to even start this problem. it says:\r
\n" ); document.write( "\n" ); document.write( "With your new lawn mower, you can mow a lawn in 4 hours. With an older mower, your friend can mow the same lawn in 5 hours. How long will it take you to mow the lawn, working together?\r
\n" ); document.write( "\n" ); document.write( "HELP! \n" ); document.write( "
Algebra.Com's Answer #36798 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
With your new lawn mower, you can mow a lawn in 4 hours. With an older mower, your friend can mow the same lawn in 5 hours. How long will it take you to mow the lawn, working together?
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\n" ); document.write( "New Mower DATA:
\n" ); document.write( "Time to mow lawn = 4 hr/job ; rate= (1/4)job/hr.
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\n" ); document.write( "Old Mower DATA:
\n" ); document.write( "Time to mow lawn = 5 hr/job ;rate= (1/5) job/hr.
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\n" ); document.write( "Working together DATA:
\n" ); document.write( "Time to mow lawn ; x hr/job ; rate = (1/x) job/hr.
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\n" ); document.write( "EQUATION:
\n" ); document.write( "new rate + old rate = together rate
\n" ); document.write( "1/4 +1/5 = 1/x
\n" ); document.write( "(9/20)=1/x
\n" ); document.write( "x=20/9
\n" ); document.write( "x=2 2/9 hrs. or 2 hr 13 1/3 minutes (This is the time to mow the
\n" ); document.write( "lawn when both mowers are used.)
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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