Determine if each ordered pair is a solution to the given system of inequalities in two variables.xy = 54x2 + y2 = 117(i) (9, -6); (ii) (-6, -9)
A. (i) No; (ii) Yes
B. (i) No; (ii) No
C. (i) Yes; (ii) Yes
D. (i) Yes; (ii) No
Answer: A
Mathematics
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What is the vertex of ?DEI?
A. I B. E C. D
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? 
A. 
B. 
C. 
D. 
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Solve the problem.An election is held among 21 candidates. What is the total number of pairwise comparisons in this election?
A. 
B. 212
C. 221
D. 21
E. 21 × 2
Mathematics
Round the whole number to the given place value.23,812 to the nearest hundred
A. 23,810 B. 23,800 C. 23,900 D. 23,700
Mathematics