Find the least common denominator for the expression.
- 
A. (13x - 18)(13x + 18)
B. 10x(2x + 11)(13x - 18)(13x + 18)
C. 10x(2x + 11)
D. (13x - 18) or (13x + 18)
Answer: A
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Find the common ratio for the geometric sequence.4, 8, 16, 32, 64, . . .
A. 4
B. 
C. 2
D. Not geometric
Find the center and the radius of the circle.3x2 + 3y2 + 6x - 12y - 60 = 0
A. (-1, 2), r = 5 B. (-2, 1), r = 25 C. (1, -2), r = 25 D. (2, -1), r = 5
Solve the problem. Assume that probabilities are representative of the best strategies. Round to two decimal places, if necessary.A person is considering three different stocks, and each is sensitive to a certain economic indicator. The indicator will be positive, neutral, or negative, and fluctuate randomly. The payoffs are given in the table below, in thousands of dollars. What is the expected value of profit? 
A. 10.54 B. 30 C. 5.18 D. 34
Multiply. Express the product in lowest terms.
? 
A. 
B. 
C. 
D. 