There were 17 students reading a book. Eight students have finished. How many students are still reading the book? (again because no one answered the other one.) PART A: + or -

PART B: both parts of a total or the total and one part or the total and both parts

Last question: both parts or the other part or the total of number books
^
choices to choose for the question <3 (also dont give me like adding or subtracting, i already know that kind of stuff, just choose the ones that are up there, you can always do less than 3 of them.)