Find all vertical asymptotes of the given function.R(x) = 
A. x = -7, x = 3, x = -3
B. x = 7, x = -3
C. x = -7, x = 3
D. x = - 21
Answer: C
Mathematics
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Find the limit.
A. 
B. -1
C. - 
D. No limit
Mathematics
Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.Vertices at (3, 0) and (-3, 0); foci at (8, 0) and (-8, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Factor the polynomial by grouping.3x2 + 7x + 21x + 49
A. (x + 7)(3x + 7) B. (3x + 7)(7x + 3) C. (3x + 7)(3x + 7) D. prime
Mathematics
Evaluate f(x) at the given value of x.f(x) = x2 + 3; x = 9
A. 84 B. 81 C. 80 D. 86
Mathematics