Simplify the expression. Write the result without using negative exponents. (Assume all variables represent nonzero real numbers.)y-6 ? y-2
A. y8
B. 
C. 
D. 
Answer: D
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Eliminate the parameter of the pair of parametric equations.x = sec t, y = tan t
A. x2 - y2 = 1 B. y = x - 1 C. y2 - x2 = 1 D. y = x + 1
Write the expression as a single logarithm.logb 6 + 1
A. logb (6 + b)
B. logb 6b
C. logb 
D. logb 6
Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083
Simplify, if possible. If the answer is undefined, state so.
A. - 45 B. 45 C. 90 D. 48