Determine the value of each variable.
= 
A. x = 6; y = 2; k = -3
B. x = 3; y = -3; k = 6
C. x = -3; y = 2; k = 3
D. x = 3; y = -2; k = -3
Answer: D
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Solve the problem.Find the area of the shaded region. Express the answer in terms of ?. 
A. 
? - 9 square units
B. 
?- 9 square units
C. 3?- 3 square units
D. 9 square units
Find the vertices and the foci of the given ellipse.
+ 
= 1
A. V: (-9, 0), (9, 0);
F:(- 6
, 0), (6
, 0)
B. V: (-81, 0), (81, 0)
F: (-9, 0) and (9, 0)
C. V: (0, -9), (0, 9);
F: (0, - 6
), (0, 6
)
D. V: (0, -9), (0, 9);
F: (0, -3) and (0, 3)
Solve the problem.Two stores sell a certain product. Store A has 37% of the sales, 3% of which are of defective items, and store B has 63% of the sales, 5% 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 one of this product as a gift. What is the probability it is defective?
A. 0.022 B. 0.043 C. 0.04 D. 0.4
Simplify.
A. 2x - 8 B. 2 C. x - 4 D. -2