## Algebra 2 (1st Edition)

$$2,3,4,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20$$
The bar means that we choose all of the values not in B between 1 and 20. Thus: $$2,3,4,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20$$