Answer:
C. 16
Step-by-step explanation:
y^2-z^2
(-5)^2-(-3)^2
25-9
16
y = - 5
y^2 = (-5)^2
y^2 = 25
z = - 3
z^2 = (-3)^2
z^2 = 9
y^2 - z^2 = 25 - 9 = 16
