What are two numbers that multiply to 6660 and add up to 84

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

Which point is a solution to y s 4x + 5?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?