Solve the problem.Given that f(x) = x2 - 4x - 13; find all values of a such that f(a) = 8.
A. a = 7 or a = 3
B. a = 7 or a = -3
C. a = -7 or a = -3
D. a = -7 or a = 3
Answer: B
Mathematics
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The eccentricity is given of a conic section with one focus at the origin, along with the directrix corresponding to that focus. Find a polar equation for the conic section. e = 5, x = -9
A. r = 
B. r = 
C. r = 
D. r = 
Mathematics
Find any values of the variable that must be excluded.
A. 4
B. 2
C. 
D. 2, -2
Mathematics
Using the given coordinate, find the other coordinate that makes the ordered pair a solution of the equation.9x + y = -48, ( 
, -48)
A. 0 B. -432 C. 9 D. -6
Mathematics
Graph the rational function. Give the equations of the vertical and horizontal asymptotes.f(x) = 
A. x = 0; y = 0
B. x = -2; y = 0
C. x = 0; y = -3
D. x = 0; y = 0
Mathematics