# How many books does the school need to order?

15. Mathplanet School has $y$ students equally divided among $x$ classes. The school wants to order enough mathbooks so that each student will have a book and each class will have 2 extra books. How many books does the school need to order?

1. $y+x$
2. $y+2+x$
3. $yx+2$
4. $y+2x$
5. $y(2+x)$