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Adrienne had a party at a local s skating rink. She spent $100 for a party room and $8 per person for skates. Let c be the total cost of the room and skates, and let f be the number of friends at her party. Write an equation to represent the problem. Which is the independent variable? Explain.
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c = 100 + 8*f c $
independent variable is f, because it does not depend on c, but c depends on f
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