Susan and Alejandro were in a race to finish their math work. Together they spent 30 minutes. Susan worked twice
as fast as Alejandro. How many minutes did each one spend on their math work.

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?