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Mathematics

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poizon [28]3 years ago

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What number is a common factor of 16 and 56

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A 75% antifreeze solution is to be mixed with a 90% antifreeze solution to get 360 liters of a 85% solution. How many liters of

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Let $x,y$ denote the volume of the 75% and 90% solutions to use, respectively. We want to end up with a 360L solution, so $x+y=360$ .

We want this new solution to have an 85% concentration so that it would contain 0.85*360L = 306L of antifreeze. The volume of antifreeze contributed by the reagent solutions are $0.75x$ and $0.9y$ , and their total should match the new solution's total volume of antifreeze, so that $0.75x+0.9y=306$ .