Provide an appropriate answer.Find 
when r = -1 and s = -3 if w(x, y, z) = xz + y2, x = 5r + 6, y = r + s, and z = r - s.
A. 
= -1
B. 
= 10
C. 
= 7
D. 
= 3
Answer: D
Mathematics
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