Let n be a positive integer. In triangle ABC, AB = 3n, AC = 2n + 15, BC = n + 30, and
angle A > angle B > angle C. How many possible values of $n$ are there?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Select the graph of the solution. click until the correct graph appears. |x| = 3