chelsearodi9660 chelsearodi9660 28-02-2022 Mathematics contestada HELP HELP HELP What is the explicit rule for the arithmetic sequence? 20. 5, 18, 15. 5, 13, 10. 5,. an=23+2. 5n an=20. 5−2. 5n an=20. 5+2. 5n an=23−2. 5n