question regarding battery reserve capacity (rv)

[macscac]

so just a general question.

I am putting a double battery setup on my 18' trailer.
2 Interstate 31m-agm's.

the reserve capacity of this battery is 190

i have never run batteries in a parallel so my question is two fold

does that mean i will have exactly double the reserve capacity?
so aprox 6 hours draw at 25amps?

and if i were using a small tv that pulled 2amps.
what would be my aprox run time before i needed to stop running the TV and recharge the battery?

I just don't know how to calculate this

Thank you!