Solve.0.4x3 - 1.6x2 - 3.2x + 3.2 ? 0
(Round to three decimal places when necessary.)
A. [0.764, 5.236]
B. [-2, 5.236]
C. (-?, -2] ? [0.764, 5.236]
D. [-2, 0.764] ? [5.236, ?)
Answer: C
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What will be an ideal response?
Find the sum or difference. Write the answer in standard form.(8 + 9i) - (-6 + i)
A. -14 - 8i B. 14 + 8i C. 2 + 10i D. 14 - 8i
Solve.2x2 + 5x + 7 = 0
A. 
B. 
C. 
D. 
The primal problem and the final tableau in the solution of the primal problem are given. Use the final tableau to solve the dual problem.Primal problem :Maximize7x1?+ 8x2subject tox1?+ 2x2? 105x1+ 4x2? 30and x1 ? 0, x2 ? 0Final tableau in solution to primal problem: x1x2?x3?x4?M 
A. Minimum = 50 when y1 = 2 and y2 = 1
B. Maximum = 50 when y1 = 2 and y2 = 1
C. Minimum = 50 when y1 = 
and y2 = 
D. Minimum = 0 when y1 = 0 and y2 = 0