0.55% as fraction in simplest form

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?