Hi i’ve been stuck on this question and i can’t get past it can someone me out with it

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

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Which will form a composite function?