PLEASE HELP i really really need help, it would be greatl appreiciated if you could help me!

x = 4, y = 0
Steps: multiplying the first equation by 2, we get 2x-2y=8. Adding that to the second equation we get 3x = 12. Dividing both sides by 3, we get x = 4. Substituting it into x-y = 4, we get y = 0.

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.