In the expression (x2 + 3), the base is a) x b) 2 c) 3

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?