If three empanadas and two drinks cost $9, and four empanadas and one drink costs $9.50, how much does a drink cost?

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

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

Evaluate cos2θ for cosθ = square root of 3/2