Final answer:
The missing term in the given sequence is -42.
Step-by-step explanation:
The missing term in the sequence -45, ___, -39 is -42.
To find the missing term, we can observe that the sequence is increasing by 6 from one term to the next (adding 6 to the previous term). So, to find the missing term, we can subtract 6 from the previous term:
-39 - 6 = -45