The second row in an auditorium has 22 seats and the fifth row has 37 seats. An arithmetic sequence can be used to define the number of seats in the nth row of the auditorium.
Which of these represents a formula that can be used to find the terms of the sequence? Select all that apply.
Aan 12+5n for n = 1, 2, 3, ...
B.
an=7+15n for n= 1, 2, 3,...
canan-1+5, a₁ = 17 for n = 2, 3, 4,
D. anan-1+15, a₁ = 7 for n=2, 3, 4