Write the expression in standard form.
A. -6i
B. -6
C. 6i
D. 6
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 = 1; local maximum at x =-1; concave down on (0, ?); concave up on (-?, 0) B. Local maximum at x = 1; local minimum at x =-1; concave up on (0, ?); concave down on (-?, 0) C. Local minimum at x = 1; local maximum at x =-1; concave up on (0, ?); concave down on (-?, 0) D. Local maximum at x = 1; local minimum at x =-1; concave up on (-?, ?)
Solve the problem.Stevie bought a stereo for $290 and put it on sale at his store at a 55% markup rate. What was the retail price of the stereo? Round to the nearest cent if necessary.
A. $390.00 B. $580.00 C. $449.50 D. $349.50
Evaluate the polynomial.7x2 + 3x - 5for x = -2
A. 7 B. 17 C. -25 D. 13
Perform the indicated operation.
- 
A. 
B. 
C. - 
D. 