Solve by completing the square.x2 + 4x = 3
A. -1 ± 
B. -2 ± 2
C. -2 ± 
D. 2 + 
Answer: C
Mathematics
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Identify the correspondence.The two triangles shown below are congruent. List the vertices corresponding to A, B ,and C in order. 
A. X, Y and Z B. Y,X and Z C. Z, X and Y D. Y, Z and X
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Integrate using any method.
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Introduce slack variables as necessary, and write the initial simplex tableau for the problem.Find x1 ? 0 and x2 ? 0 such that x1 + x2 ? 543x1 + x2 ? 198and z = 2x1 + x2 is maximized. 
A. 
B. 
C. 
D. 
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Use the distance formula to find the length of the line segment. Express your answer as a simplified radical. 
A. 16
B. 16
C. 4
D. 4
Mathematics