Final answer:
To solve the equation, first multiply both sides by 2.5, and then add 10 to isolate k, resulting in k = -5, which is the correct option/ choice A.
Step-by-step explanation:
To solve the equation k - 10 / 2.5 = -2, we need to isolate k by following two steps:
- First, multiply both sides of the equation by 2.5 to get rid of the denominator next to k. This gives us k - 10 = -5.
- Next, add 10 to both sides of the equation to solve for k. This results in k = 5.
So the correct answer is A. k = -5.