For a segment of a radio show, a disc jockey can play 7 records. if there are 12records to select from, in how many ways can the program for this segment be arranged?

Which of the following questions is a statistical question? (2 points) how many professional sport leagues are there? where do the professional sport leagues play? how many hours of professional training took place over the weekend? how many hours do you spend each week training for a sports league?

What are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5

Find the degree 3 taylor polynomial p3(x) of function f(x)=(-3x+15)^(3/2) at a=2