A bus can hold 42 students

If there are 400 students going on a trip, how many buses are need for all of the students to attend?

How many empty seats will be on the last (not full) bus?

10, there will be 20 left open

Step-by-step explanation:

if each bus holds 42 students and there are 400 going then you need to divide 400 by 42, and then round up, to find how many seats will be left open, you take the answer and then multiply it by 42 and then subtract 400.

sorry for not putting my work last time.