Final answer:
When arriving at an intersection with no traffic signs or signals at the same time as a vehicle to the right, the appropriate action is to stop and let the vehicle on your right go first.
Step-by-step explanation:
When approaching an intersection with no traffic signs or signals and arriving at the same time as a vehicle to your right, the appropriate action is to stop and let the vehicle on your right go first. This is known as the 'right-of-way' rule, where the vehicle on the right has priority.