First 4 terms and 10th term of 5 - 2n

Is this a polynomial function? i need to know asap

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

Someone answer asap for ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?