Find the solution to the system of equations.
x - 2y - z= -2
x+2y+
z= 0
y+ 3z = 3
a. x=-1, y = 0, z = 3
b. x= -1, y=-1, z = 0
c. x=-1, y=1, z= 1
d. x=-1, y= 0, z = 1

=> D

X-2y-z=-2
X+2y+z=0
Y+3z=3

2x=-2
X=-1

(-1)+2y+z=0
2y+z=1
Z=-2y+1

Y+3(-2y+1)=3
Y-6Y+3=3
-5y=0
Y=0

Y+3z=3
0+3z=3
Z=1

Iam thinking the answer is a.) knew

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.