Which of the following does not lie on the graph of y = 2x - 2? (-1/2, -3) (1/2, 1) (-1, -4)

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

How do you solving the solution of each system using elimination?