Find the sum of the series shown. -3 + 0 + 3 + 6 + 9
0 + 3 + 6 + 9 + 12
0 + 3 + 6 + 9 + 12 + ...
-3 + 0 + 3 + 6 + 9 + ...

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

i think it is 70

step-by-step explanation: