Solve the equation by completing the square.x2 + x + 9 = 0
A. 
B. 
± 
i
C. - 
± 
i
D. 
Answer: C
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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 = 3; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0) B. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3) C. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0) D. Local maximum at x = 3; local minimum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3)
Write the percent as a decimal.46.6%
A. 4.66 B. 0.466 C. 0.0466 D. 0.356
Perform the operation. Write the answer as a fraction in lowest terms.
- 
A. 
B. 
C. 
D. 
Remove grouping symbols and simplify.8{9y2 + 4[7y2 - (y + z2)]}
A. 100y2 - 4y - 4z2 B. 296y2 - 32y - 32z2 C. 264y2 - 32y D. 296y2 - 8y + 8z2