Help please. I already got most of the problem done.

What are the domain and range of the functiony = 2(x - 3)2 + 4?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance