Help pls :) I can only find one way

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

Which of the following segments is a diameter of o?

Ineed ! what is the connection between ratios, fractions, and percents? give an example with your answer.