Question 556927
A druggist has two mixtures of a certain chemical and water, one containing 10% of the chemical and the other containing 40% of the chemical. How much of each mixture should he use to make 10 ounces that contain 25% of the chemical?
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25 is the average of 10 and 40, so it's equal amounts.
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If x is the amount of 10% mixture used, then which expression represents the ounces of chemical contained in it?
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Not sure what that means.