Answer:
-70
Step-by-step explanation:
As shown in the picture, you can use the formula:
1st term + common difference(desired term -1)
From what is given, we can see that the first term is -2. We are looking for the 18th term, so 18 is our desired term. Lastly, to find the common difference, we can subtract a the term before a certain term from it:
common difference = -6 - (-2) = -4
Now, we can substitute what we have:
-2 + (-4)(18 - 1)
-2 - 4(17)
-2 - 68
-70
