What are the possible solutions to this system?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?