?Find the standard deviation ? for the following probability distribution. Round your answer to three decimal places.
??
?x? 12345 ?P?(?x)
?
A. ?3.200
B. ?1.720
C. ?8.762
D. ?2.960
E. ?1.789
Answer: B
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Locate each number on a number line.-1.5, 0.75, 2.25, -2.5
A. 
B. 
C. 
D. 
Find an equation for the line, in the indicated form, with the given properties. Containing the points (3, -2) and (-1, 7); general form
A. 5x - 8y = -51 B. 9x + 4y = 19 C. -9x + 4y = 19 D. -5x + 8y = -51
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
Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. {(10, 10)} B. {(0, 0)} C. {(10, 0)} D. {(0, 10)}