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If g(x) is an odd function, which function must be an even function?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?