Solve each system of equations using the elimination method. check the solution. 5. 6 = 4x + 2y -19 = 4x - 3y 6. 4x - y = -2 2x + y = 2 7. 3x + 8y = 2 4x - 2y = -10 8. 2x - 4y = 10 -4x + 3y = -20

5. the answer is (x,y) = (-1,5)

6. the answer is (x,y) = (0,2)

7. the answer is (x,y) = (-2,1)

8. the answer is (x,y)= (5,0)

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.