Question

– 11 is the __________ term of the arithmetic sequence – 847, – 836, – 825, – 814, – 803, …

Answer 1

use

term(n) = a + (n-1)d

here a = -847 , d = 11 , n = ?? , and term(n) = -11

solve :
-11 = -847 + (n-1)(11)

which should be pretty straightforward to do.