The first rule is add 9, then divide by 2 starting from 1. The second rule is multiply by 2, then subtract 4 starting from 8. What are the first four ordered pairs using the two sequences? (1, 8), (5, 12), (7, 20), (8, 36)
(1, 10), (5, 16), (7, 28), (8, 52)
(0, 8), (5, 12), (7, 20), (8, 36)
(2, 8), (6, 12), (8, 20), (9, 36)

Atutoring service offers a free one-hour tutoring session. after a client signs up, the next 10 hours of tutoring are billed at a rate of $30 per hour. for all the hours after that, the client receives a discounted rate. if a client pays $664 for 25 hours of tutoring, what is the service's discounted hourly rate? a) $24.50 b) $25.54 c) $26.00 d) $26.56