Explain how to solve the problem if u can

Which of the following lines is not parallel to the graph of y = 4x +7?

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.