Solve the system of equations by the elimination method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. ?
B. {(1, 1)}
C. 
D. {(-3, -9)}
Answer: C
Mathematics
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Refer to the weighted voting system 
and the Banzhaf definition of power. (The four players are P1, P2, P3, and P4.)The weight of the coalition {P2, P3, P4} is
A. 25. B. 40. C. 22. D. 21. E. none of these
Mathematics
Divide and, if possible, simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Multiply or divide as indicated. Make sure that your answer is reasonable by estimating first. 3.87 × 4
A. 7 B. 7.87 C. 15.48 D. 15
Mathematics
Divide.34.66 ÷ 10
A. 346.6 B. 0.03466 C. 3466 D. 3.466
Mathematics