What is 300+3x40-25x4=?

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?

What is the maximum of the sinusoidal function

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?