SOLUTION: 7 quarts of pure antifreeze is mixed with 9 quarts of a solution that is 12% antifreeze. Answer the questions below. Do not do any rounding. (a) How many quarts of antifree

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Question 1000666: 7 quarts of pure antifreeze is mixed with
9 quarts of a solution that is
12% antifreeze.
Answer the questions below. Do not do any rounding.
(a) How many quarts of antifreeze are in the resulting mixture?
(b) What percentage of the resulting mixture is antifreeze?

Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
7 quarts of pure antifreeze is mixed with
9 quarts of a solution that is
12% antifreeze.
Answer the questions below. Do not do any rounding.
(a) How many quarts of antifreeze are in the resulting mixture?
Equation:
alcohol + alcohol = alcohol
1*7 + 0.12*9 = 7 + 1.08 = 8.08 quarts of alcohol in the mix
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b) What percentage of the resulting mixture is antifreeze?
Ans: 8.08/16 = 51%
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Cheers,
Stan H.
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Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(a)
+.12%2A9+%2B+7+=+1.08+%2B+7+
+1.08+%2B+7+=+8.08+ = quarts of pure antifreeze in mixture
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(b)
+8.08+%2F+%28+9+%2B+7+%29+=+8.08+%2F+16+
+8.08+%2F+16+=+.505+
+.505%2A100+=+50.5+
50.5% of the mixture is antifreeze