Find the vertex, the focus, and the directrix of the parabola.2x2 - 12x - y + 20 = 0
A. V: 
; F: (3, 4); D: x = 0
B. V: (3, 2); F: 
; D: y = 
C. V: 
; F: (3, 10); D: x = 6
D. V: 
; F: 
; D: x = 
Answer: B
Mathematics
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The table lists some input-output pairs for an exponential function f. Use the table to find the requested value.Find x when f(x) = 18. 
A. 2 B. 3 C. 18 D. 0
Mathematics
Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants.
A. 
+ 
+ 
B. 
+ 
+ 
+ 
C. 
+ 
+ 
+ 
D. 
+ 
+ 
Mathematics
Simplify the radical.
A. 
B. 
C. 
D. 
Mathematics
Use Cramer's rule to find the solution of the system, if possible.
A) x = 6, y = -6
B) x = 2, y = -2
C) x = 6, y = -14
D) The system is inconsistent.
E) The equations are dependent.
Mathematics