What is the sum of a 22-term arithmetic sequence where the first term is 55 and the last term is -29?
Choose one answer.
a. 260
b. 286
c. 312
d. 338

Question

What is the sum of a 22-term arithmetic sequence where the first term is 55 and the last term is -29?
Choose one answer.
	 a. 260	
	 b. 286	
	 c. 312	
	 d. 338

anonymous · Answer

Could you show us what you've done so far please?

mertsj · Answer

You need to hunt up your formula for the sum of an arithmetic sequence.

anonymous · Answer

What is the 7th term of the geometric sequence 3, 9, 27, ...?
Choose one answer.
	 a. 2,187	
	 b. 6,561	
	 c. 19,683	
	 d. 59,049

goformit100 · Answer

First of all for solving this question do you know the conception of : arithmetic sequence.