snp5kc4xxt snp5kc4xxt

03-06-2021
Mathematics

contestada

Find the sum of the first 30 terms for the given arithmetic sequence.
8, 1, -6, -13,...
-3107
-2805
-1705
-2508

Respuesta :

jcherry99 jcherry99

03-06-2021

Answer:

Step-by-step explanation:

Find the last term of the sequence.

a1 = 8

d = -7

n = 30

a30 = 8 + (n - 1)*(-7)

a30 = 8 + (30 - 1)*-7

a30 = 8 + 29*-7

a30 = 8 - 203

a30 = -195

Sum = (a + L)*n/2

Sum = (8 + -195) * 30/2

Sum = - 187 * 15

Sum = - 2805

Answer Link

Otras preguntas

what is responsible for the breakdown and absorption of nutrients

give an example of the same volume but different mass ??

Why does the narrator feel melancholy after he learns that the Martians have all died? A. He had hoped that humans and Martians would find a way to live tog

Last Summer the lifeguards rescued 6 adult swimmers?direct object?

I need to know the answer.

what is 10t=6t+24 than you!

What is the Initials of Washington

Naturalism extends the concepts behind realism in that it a. tries to imitate reality in a believable way. b. creates real situations in a natural setting. c.

In order to buy most homes, you have to arrange an up front payment of a portion of the house value, called a ________. a. Mortgage b. Closing fee c. Down pa

According to the article, the use of ____________________ is what makes flamenco unique in a musical sense. a. varied musical instruments c. simplistic harmonie