document.write( "Question 331418: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? \r
\n" ); document.write( "\n" ); document.write( "I started off by:
\n" ); document.write( "(x/5) + (x/10) + (x/15) = 1\r
\n" ); document.write( "\n" ); document.write( "Need a common denominator in order to add:
\n" ); document.write( " which is 30.\r
\n" ); document.write( "\n" ); document.write( "(6x/30) + (3x/30) + (2x/30) = 1\r
\n" ); document.write( "\n" ); document.write( "= (6x + 3x + 2x)/ 30
\n" ); document.write( "= 11x/ 30
\n" ); document.write( "= x = 30/11 = 2.72 which is 2 mintues and 7 seconds\r
\n" ); document.write( "\n" ); document.write( "However, the answer is not correct according to the solution. Am I missing a step? Or is the solution incorrect? \n" ); document.write( "

Algebra.Com's Answer #237616 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
But 2.72 min is not 2 min, 7 sec. It's: 2 + .72(60) = 2 min 43.2 sec \n" ); document.write( "

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