Hello!

My first AA J flight tomorrow, LHR to LAX, then I’m connecting to a flight to LAS but the connection time is only 1 hour and 50 minutes, assuming the flight lands on time..

Couple of questions please..
1/Will my luggage be checked through all the way Vegas or will I have to pick it up and then check in all over again in LA?
2/ If yes to checked through, the arrival gate is 41 and the departure gate is 42B, looking at the map it’s 30 yards apart.. I’m guessing I’ll have to clear immigration first though? Is there a flight transfers immigration area and is it any faster?

How close am I cutting this? Yesterday’s flight landed almost 50 minutes late..

Thanks in advance!