Solve the equation in the complex number system.x2 + 49 = 0
A. {-7i, 7i}
B. {7}
C. {-7, 7}
D. {7i}
Answer: A
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Answer the given question by setting up and solving the appropriate proportion. If necessary, round the answer to two decimal places.One computer line printer can print 800 lines/min, and a second can print 2000 lines/min. If they print a total of 4200 lines while printing together, how many lines does each print?
A. 1100 lines, 3100 lines B. 1400 lines, 2800 lines C. 1200 lines, 3000 lines D. 1000 lines, 3200 lines
Find the coordinates of the midpoint of the line segment PQ.P(y, z), Q(z, y)
A. (y + z, y + z)
B. 
C. (yz, yz)
D. 
Solve the nonlinear system of equations.y = 
2x - y = -6
A. 
B. 
C. 
D. 
Suppose a game has this payoff matrix. Find the expected value of the game for the specified strategies of A and B. 
A. 1.93 B. 2.65 C. -0.04 D. -1.62