If R is the midpoint of QS, RS= 2x-4, ST=4x-1, and RT=8x-43 Find QS​

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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 ?