Can you buy a car in Alaska and drive it back to the continental US if are not an resident?

No, you cannot buy a car in Alaska and drive it back to the continental US if you are not a resident. In order to register a vehicle in the United States, you must be a resident of the state in which you are registering the vehicle. If you are not a resident of Alaska, you will not be able to register the car there and will not be able to drive it back to the continental US.