Ben's auto dealer had a sale on saturday for its new cars. by 10 a. m. 30% of the new cars had been sold. what decimal represents the percent of cars that have not been sold by 10 a. m.?

Precalculus question, image attached.

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?

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?