How do I solve system of equations by graphing

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 dimensions can créate more than one triangle ?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5