I don’t really understand this. Could anyone help me?

What is the value of f(x) = 2.2 for f(-2)?

If f(x) = 4 - x2 and g(x) = 6x, which expression is equivalent to (g-f)(3)? 06-3-(4 + 3)2 06-3-(4-33 6(3) - 4 +32 6(3) -4 -32

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax