Solve the equation.
- 
= -6
A. z = -3
B. z = 9
C. z = 8
D. z = -4
Answer: A
Mathematics
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Find the conditional probability.If three cards are drawn at random without replacement from a standard deck, find the probability that the third card is a face card, given that the first card was a queen and the second card was a 5.
A. 
B. 
C. 
D. 
Mathematics
Evaluate.(-9)2
A. -81 B. 18 C. 81 D. -18
Mathematics
Factor.x2 + 5x + 4
A. (x + 4)(x - 1) B. (x - 4)(x - 1) C. (x + 4)(x + 1) D. (x - 4)(x + 1)
Mathematics
Decide whether or not the set is closed under multiplication.W - {10}
A. Closed B. Not closed
Mathematics