Answer:
A. 44 students are going
B. 4 Teachers are going
C. 3?
Explanation:
A. 44 students are going because if you take 11 students and 1 teacher you multiply 11 by 4 and get 44 add 4 more 48 in total.
B. ^^^
C. Take 21 from 48 two times. You have 6 left over. So you ethier cram the 6 left over in there or get another bus.
Hope I helped!!