PLEASE HELP ME
What is the 35th term of the arithmetic sequence where a1 = 13 and a17 = -83?

-200
-197
-194
-191

Question

PLEASE HELP ME
What is the 35th term of the arithmetic sequence where a1 = 13 and a17 = -83?
 	
	-200
	-197
	-194
	-191

cwrw238 · Answer

you first need to find the common difference d
then 35th term = a1 + ( 35 - 1)*d

cwrw238 · Answer

you can find d by calculating (a17 - a1) /  x
what do you think x has to be?

anonymous · Answer

i just need the answer, im taking a timed quiz

anonymous · Answer

i dont know how to solve that

cwrw238 · Answer

you can calculate a17 - a1  = -83 - 13

cwrw238 · Answer

and x = 17 -  1 = 16 terms

anonymous · Answer

soo? after that

anonymous · Answer

-83 = 13 + 16d

...and..

-96 = 16d
d = -6

So...

a_35 = 34(-6) + 13
= -204 + 13
= -191

anonymous · Answer

HURRRY MY TEST IS ALMOST OVER

anonymous · Answer

OKAY THANK YOU! :) SO MUCH.

anonymous · Answer

ALSO What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90?