A car made 60-mph trop an average speed of 20 mph. On the return trip, the cars average speed was 30 mph. What was the average speed for the entire two way trip?

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.