This is the 4586th most frequent Korean word.
가하고
"가하고" means "and" or "with" in colloquial Korean, used to connect nouns.
In this sentence '가하고' is used as a conjunction, equivalent to 'and' in English, connecting two subjects of study.
나는 수학 가하고 영어를 공부한다.
I study mathematics and English.
Here '가하고' links two places, showing connection and addition in the context of locations the friend plans to visit.
친구는 도서관 가하고 카페에 갈 예정이다.
The friend plans to go to the library and the cafe.
In this example '가하고' acts to combine two actions mentioned about a person, used similarly as 'and' when listing actions.