document.write( "Question 692315: Bill can mow a lawn in 1 1/2 hours with a riding lawn mower. Joe can mow it in 2 1/2 hours with a push mower. How long should it take to do the job if they work together? (HINT: Rates add. Rate(Bill) + Rate(Joe) = Rate(together) and rate is amount mowed divided by time taken.) \n" ); document.write( "
Algebra.Com's Answer #426967 by unlockmath(1688)\"\" \"About 
You can put this solution on YOUR website!
Hello,
\n" ); document.write( "We can use the following equation:
\n" ); document.write( "x/1.5 + x/2.5 = 1
\n" ); document.write( "Multiply by 15 to get:
\n" ); document.write( "10x + 6x = 15
\n" ); document.write( "Combine and divide by 16:
\n" ); document.write( "x= 15/16 of an hour.
\n" ); document.write( "Make sense?
\n" ); document.write( "RJ
\n" ); document.write( "www.math-unlock.com
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