Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = 0, x = -7
B. x = 0, x = -7, x = -3, x = -2
C. x = -7
D. x = -3, x = -2
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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Determine the coordinates of the focus and the equation of the directrix of the parabola.y2 = -4x
A. F(0, -1), y = 1 B. F(1, 0), x = -1 C. F(-1, 0), y = 1 D. F(-1, 0), x = 1
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Solve by completing the square. Give exact solutions. Simplify radicals and reduce.2x2 + 6x = -2
A. 
B. 
C. 
D. 
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Find f(x) = a(x - h)2 + k so that f models the data exactly.
A. f(x) = 
(x - 5)2 - 8
B. f(x) = (x + 5)2 + 8
C. f(x) = 
(x + 5)2 + 8
D. f(x) = 2(x - 8)2 - 5
Mathematics