1. The first term of an arithmetic sequence is 4 and its sixth term is 19. Find the common difference of the sequence
A 1
B. 2
C. 3
D. 4

2. what is the nth term of the arithmetic sequence 10,14,18,22,26...?
A.10n + 4
B. 10n + 6
C. 4n + 4
D. 4n + 6​