<PRE><B>Question 659082</B>
Miracle-Gro All purpose liquid plant food had 12% nitrogen. Miracle-Gro Quick Start liquid plant food had 4% nitrogen. If 2 cups of the All Purpose plant food are mixed with 3 cups of the Quick Start plant food, determine the percent of nitrogen in the mixture?
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Equation:
nitrogen + nitrogen = nitrogen
0.12*2 + 0.04*3 = x(2+3)
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Multiply thru by 100 to get:
12*2 + 4*3 = 500x
500x = 36
x = 7.2%
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Cheers,
Stan H.</PRE>