Use quadratic regression to find a function that fits the following points (1,4),(2,2),(5,8)

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

What is the absolute value of the complex number -4-sqrt2i

Will mark name all segments skew to bc