3. Addyson took five quizzes this marking period in Math. On the first four she scored a
79, a 94,83, and a 87. She has a quiz average
of 86. Find the score, x, that Addyson received
on her last quiz.

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