Explain why​ "dial combinations" are not mathematical combinations expressed by the equation Subscript n Baseline Upper C Subscript x Baseline equals StartFraction n exclamation mark Over x exclamation mark left parenthesis n minus x right parenthesis exclamation mark EndFraction

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?