Question

What is the sum and how did you get it (-5) +(-8) +(-11) +... +-95.
Possable answers a -1550 b -3100 c -1472 or d 300.

Answer 1

Simplify the following:
-5-8-11-95
Group the negative terms in -5-8-11-95 together and factor out the minus sign.
-5-8-11-95 = -(5+8+11+95):
-(5+8+11+95)
Evaluate 5+8+11+95 using long addition.
| 1 |
| 9 | 5
| 1 | 1
| | 8
+ | | 5
1 | 1 | 9:
Answer: |
| -119

Answer 2

\(\large{\sum\limits_{i=-5}^\infty a_{n-1}+(a_{n-1}-3)}\)

I believe this is correct.

Answer 3

That's what I kept getting but the possable answers are -1550,-3100, -1472, or 300