SOLUTION: An exercise machine with an original price of $652 is on sale at 20% off. What is the exercise machine's sale​ price? The exercise​ machine's sale price is ​$??.

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Question 1070056: An exercise machine with an original price of $652 is on sale at 20% off. What is the exercise machine's sale​ price?
The exercise​ machine's sale price is ​$??. ​(Round to the nearest cent as​ needed.)
Suppose 22 pints of aa 21​% alcohol solution is mixed with 8 pints of an 80​% alcohol solution. What is the concentration of alcohol in the new 10​-pint ​mixture?
The concentration of alcohol in the new 10​-pint mixture is ?
Answer by stanbon(75887) About Me  (Show Source):
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An exercise machine with an original price of $652 is on sale at 20% off. What is the exercise machine's sale​ price?
Equation::
Sale price = 652-0.2*652 = 0.8*652 = $521.60
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The exercise​ machine's sale price is ​$??. ​(Round to the nearest cent as​ needed.)
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Suppose 2 pints of a 21​% alcohol solution is mixed with 8 pints of an 80​% alcohol solution. What is the concentration of alcohol in the new 10​-pint ​mixture?
Equation:
alch + alch = alch
0.21*2 + 0.8*8 = x*10
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0.42 + 6.4 = 10x
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10x = 6.82
x = 0.682
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Ans:: 68.2% (Percent alcohol in the final solution)
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The concentration of alcohol in the new 10​-pint mixture is ?
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Cheers,
Stan H.
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