The three counters shown in the table are used for a board game. if the counters are tossed , how many ways can at least one counter with side a occur?

Prove that 16^4-2^13-4^5 is divisible by 11.

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours

Point a is at 12, and point d is at 56. point c is midway between a and d, and point b is midway between a and c. which of these is the coordinate of b?