Question

a theater has 35 rows of chairs. The first row has 20 chairs, the second has 22, the third has 24, and so on. in total, the theater seats___ people.

Answer 1

This is an arithmetic progression with the common difference 2 and first term 20.
find and pls tell me the 35th term using the following formula
T_n=a+(n-1)d
a-first term
n=35
d-common difference