How can I get started looking for the characteristics of this graph? The parent function is cosine. I think it is a reflection, but I don't know where to go from there.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?