Find the equation of the axis of symmetry of the following parabola algebraically

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?