Answer:
1. yes
2. yes
3.no
4.yes
5.no
6.no
7. never true
8. always true
9. never true
10. always true
11. always true
12. never true
13. 108
14. 80
15. 70
16. 123
17. 38
18. 167
19. 10
20.154
Step-by-step explanation:
