What are associative on rational numbers

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

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?

5. write an equation for the line that is parallel to the given line and that passes through the given point. y = –5x + 3; (–6, 3)