Solve.Use the following graph to solve x2 - 4x - 5 = 0.y = x2 - 4x - 5
A. -1, 5
B. 5, 1
C. -5, 1
D. -5, -1
Answer: A
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Perform the indicated operations. Write the result in the form a + bj.
2
A. -32 + 126j B. 32 + 126j C. 32 + 2j D. 32
Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = +1.29,; local maximum at x = -1.29; concave up on (0, ?); concave down on (-?, 0) B. Local minimum at x = +1.29,; local maximum at x = -1.29; concave up on (-?, -1.29) and (1.29, ?); concave down on (-1.29, 1.29) C. Local minimum at x = -1.29,; local maximum at x = +1.29; concave up on (-?, -1.29) and (1.29, ?); concave down on (-1.29, 1.29) D. Local minimum at x = +1.29,; local maximum at x = -1.29; concave down on (0, ?); concave up on (-?, 0)
Use Cramer's Rule, if possible, to solve the system of linear equations. 
A. 
B. 
C. 
D. not possible
Use estimation to determine which calculation is incorrect.
A. 
B. 
C. 
D. 