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Mathematics 25 Online
OpenStudy (anonymous):

On Fridays at the ballpark, a cup of soda is $3; each refill is $0.50. If x represents the number of refills, which of the following functions represents the amount a person spends on soda? f(x) = 0.5x + 3 f(x) = 3x + 0.5 f(x) = 3x + 3.5 f(x) = 0.5x + 3.5

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