3 5 7 +2 1 9 −( 5 7 + 1 9 )

518

Step-by-step explanation:

Add 357 and 219 ( 594 )

( The negative symbol by an parenthesis means that there will be a 1 so it will be -1 )

Multiply -1 by each number in parenthesis

Then subtract -19 from -57 ( -76 )

Lastly you subtract -76 and 594

You should get your answer

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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.