*EXTRA PTS* Please explain how to evaluate

Step-by-step explanation:

To evaluate the approximate square root of 7 you would take the two closest numbers which happen to be and so you look to see where your falls closest which it is closer to 9.

If we simplify our   and you would get 2 and 3

Since is closer to the we would say the answer is approximately 2.6 or 2.7

Hope this helps! Good luck!  

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.