Question

Evaluate each arithmetic series described (find the sum).

15
(13 – 5n)
=
n=1
Helppppp

Answer 1

120

Explanation:

first figure out parenthesis

replace n for 1 then you get 13-5, and you get 8.

then you just have to multiply 15 x 8.

then you get 120

Answer 2

120

Explanation: