Question

What is the sum of the arithmetic sequence 9, 14, 19, ..., if there are 34 terms?
Choose one answer.
a. 3,077
b. 3,111
c. 3,145
d. 3,179

Answer 1

a=9 ,d=5 ,n=34
where n = number of all terms
sn=n/2[2a+(n-1)d]
use this law and get the sum

Answer 2

I have no clue im so confused sorry bad at math...

Answer 3

a=first term ,d=difference between every term , n = number of all terms
use the law which i gave you and substitute every letter with its value ...

Answer 4

I did that but it didn't give me one of the answers

Answer 5

never mind did it wrong got i tnow thanks