Which equation is a function of x? x = 5
x = y squared + 9
x squared = y
x squared = y squared + 16

Ineed me i stuck and i don’t want to get it wrong

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?

Solve the system of equations. y=3x-1 and y=-2x+9. show work