Please help with this

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

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

Need this at the city museum, child admission is 6 and adult admission is 9.20. on tuesday, 132 tickets were sold for a total sales of 961.60. how many adult tickets were sold that day?