Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(0, 5)}
B. {(-1, 5)}
C. no solution; ?
D. {(0, 4)}
Answer: D
Mathematics
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Use spherical coordinates to find the volume of the indicated region.the region that lies inside the sphere 
and outside the cylinder 
A. 
B. 
C. 
D. 
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Solve. 
+ 5 = 15
A. 9 B. 29 C. 5009 D. 10,018
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Solve by completing the square to obtain exact solutions.x2 + 5x - 5 = 0
A. 
B. 
C. 
D. -5 ± 3
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Find a? b.a = 7i - 4j, b = 4i + 3j
A. 
B. -40
C. 16
D. 
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