To establish the purpose and point of view.
Given:
7i - 5 = o
i = -2
7(-2) - 5 = -14 - 5 = -19 Choice A.
Both numbers are in negative form, addition must be performed and the negative sign must be carried over to the sum.
This is persuasive writing written with the persuasive technique technique of Logos, which is the use of persuasion to someone's logical reasoning and using supportive facts to back it up. All the the facts presented here about the testing they do and filtering process used appeals to one's logical reasoning. That said, reading through the answers, the author's motivation is to sell the water, so the facts must speak to its credibility. Therefore, we know this is not a consumer, we know there is a motive to sell, so D is the best answer.
Some people that are diagnosed with ADHD or ADD do not take the recommended course of treatment, and therefore might be requested not to be in the military. However, if someone diagnosed with ADHD or ADD takes the recommended course of treatment, and this doesn't impair their work in a significant way as measured by military staff, then it should be fine for them to work in a military setting.
Why do you ask?
Answer:
repeat or copy out words from a text or speech written or spoken by another person
