Alibrary had a collection of 522 children’s books in its collection. more books were added to the collection this year. the library now has 741 books. how many books were added to the collection?

David is standing on the sixth rung of a ladder while painting his house. which expressions represent a change in david’s position of 2 rungs on the ladder? choose exactly two answers that are correct. a. 6+2 b. 6-2 c. 2x6 d. 6/2