Answer:
1,333
Step-by-step explanation:
Answer: 
Step-by-step explanation:
The formula for finding the nth term of an arithmetic sequence is given as:

first term = -15
common difference = -6 - (-15) = 9
number of terms
substituting into the formula , we have :


The correct answer is 7. You add five to both sides then divide by three and you get 7 for x