Use the information to answer the question.
Information
A librarian made a graph to show the types of books on a bookshelf. He still needs to add data to represent 3 animal books.
A graph.
Short description, A graph.,Long description,
The pictograph shows types of books and book pictures. A key shows 1 book picture equals 2 books.
Mystery, 3 book pictures.
History, 4 book pictures.
Sports, 1 and 1-half book pictures.
Travel, 1 book picture.
Animals, no pictures yet.
Question
How many more history books and animal books ,begin emphasis,combined,end emphasis, are there than mystery books? Enter the answer in the box.
According to the graph, there are 4 book pictures representing history books and 3 book pictures representing mystery books. Therefore, there are 4 - 3 = 1 more history book than mystery books.
Since there are currently no book pictures representing animal books, we need to add 3 book pictures to represent the 3 animal books.
So, the combined number of history books and animal books is 4 + 3 = 7.
Therefore, there are 7 - 3 = 4 more history books and animal books combined than mystery books.