Question

What is the sum of a 30-term arithmetic sequence where the first term is 71 and the last term is -103? Answers to choose from.

a)-480
b)-448
c)-416
d)-384

Answer 1

@Hero

Answer 2

@surdawi

Answer 3

@hba

Answer 4

use reqd sum=(n/2)(first term +last term)=(30/2)(71+ -103) = -480

Answer 5

Thank you soo much i have 2 more questions left to do then i can go to bed would you please help me get them done ill give you medals for both? @matricked

Answer 6

if possible i will help u...

Answer 7

Thank you soo soo much

Answer 8

welcome