Answer:
Step-by-step explanation:
Inputs are the first number output is the second. So youre outputs are 2, -1, -1, and 3. so i would say b
i think A is the answer in sin and cos
C) x=2 y=-5
y=7x-19
-2x+3(7x-19)=-19
19x=38
x=2
-2(2)+3y=-19
y=-5