Question

Find the sum of the given arithmetic series.

27 + 20 + 13 + 6 + ... + (–36)

Answer 1

It's decreasing by seven each time. That is:

27+ 20+ 13+ 6 - 1 - 8 - 15 - 22 - 29 - 36

This simplifies too:
66 - 111

Answer 2

The "... +(-36) Means we're only going to -36, once we get there we stop.

Answer 3

Can you do the last part by yourself?

Answer 4

10/2 x (27-36) = 5.(-9) = -45

Answer 5

Kae, don't give out the answer.

Answer 6

pshhhh thankss :)