Question

Insert one term between -13 and -119 to create an arithmetic sequence of three terms.

Answer 1

-66

Explanation:

the sequence goes -13,-66,-119

just subtract with 53

(decreasing arithmetic sequence)

Answer 2

-66

Explanation:

- 13, ____, -119

first, find the common difference:

-13 - (-119) = 106

next, divide 106 by 2:
`(106)/(2)` = 53

so, the common difference is 53.

now, subtract 53 from -13:

-13 - 53 = -66