How do you factor this? (x-3)(x+1)+(x-3)(x+8)

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?

Graph the following system of linear inequalities. identify at least two points in the solution: y < 5 - 2x | x + 5y > -7

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.