What is the number of ways to arrange 8 objects from a set of 10 different objects?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

If you could answer these your a life saver