Let n be the number of nights Alejandro can stay in Asheville.
He knows the hotel costs $105 per night, so he can count that n nights will cost $105n.
The round trip flight costs $249. Then the total amount of money he has to spend is $105n+$249 and since his budget cannot be greater than $700, he can conclude that
105n + 249 ≤ 700.
Answer: The correct choice is A.