Which ordered pairs are a solution to the equation y=x+9

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?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Eis the midpoint of line segment ac and bd also line segment ed is congruent to ec prove that line segment ae is congruent to line segment be