The answer is below.
Work Step by Step
The answers to 113 to 120 do not change, and therefore this answer can be verified by viewing the answer section for each individual question. In order to do this problem, you must identify (1) if the numbers in parentheses are being added or subtracted. If they are being added, use the top equation, and if they are being subtracted, use the bottom equation. Next, identify what is a and what is b, and then plug in these values. (For instance, in the case of 119, a = 3n and b = -2.