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A painter wishes to mix paint worth $15 per gallon with paint worth $18 per gallon to make a 12-gallon mixture worth $16.75 per gallon. How many gallons of each should he mix?
Find the mode of each set of numbers. 9, 8, 10, 9, 9, 10, 8
The sum of two numbers is 39 and their difference is 7. What are the numbers?
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