Solve the system of equations using substitution.
A. x = -5, y = -1; x = 8, y = 
B. x = 5, y = 1; x = - 
, y = -8
C. x = -5, y = -1; x = 
, y = 8
D. x = 5, y = 1; x = -8, y = - 
Answer: D
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is improper, but the integral 
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What will be an ideal response?
Solve the problem.Find the centroid of the region bounded above by the sphere 
and below by the plane 
if the density is constant.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 12
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
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A. 4892 mi B. 4896 mi C. 4802 mi D. 4902 mi
If ? is an angle in the indicated quadrant, determine whether the given function is positive or negative.II, sec ?
A. Negative B. Positive