Provide an appropriate answer.Find 
when r = -5 and s = -3 if w(x, y, z) = xz + y^2, x = 2r + 5, y = r + s, and z = r - s.
A. 
= -25
B. 
= -18
C. 
= -20
D. 
= -4
Answer: A
Mathematics
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