Solve the equation by factoring.x2 - 4x - 21 = 0
A. {3, -7}
B. {-3, 7}
C. {-3, -7}
D. {3, 7}
Answer: B
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Evaluate the expression for the given value of x.
?
A. 0 B. -5 C. 5 D. 15 E. -15
Find the annual percentage rate using the annual percentage rate table.
Amount Financed: $620Finance Charge: $50.59 Number of monthly payments: 18
A. 11.25% B. 12.50% C. 11.50% D. 10.00%
Determine whether the functions f and g are inverses of each other.f(x) = 3x + 6; g(x) = 
A. Yes B. No
Given f(x) = x + 36/x.
(a) Find the intervals on which f is increasing or decreasing. (b) Find the relative maxima and relative minima of f. a. (a) Increasing on (-6, 6), decreasing on (?, -6) and (6, ?) (b) Rel. max. f(6) =12. rel. min. f(-6) = -12. b. (a) Increasing on (-6, 0) and (0, 6), decreasing on (?, -6) and (6, ?) (b) Rel. max. f(6) =12, rel. min. f(-6) = -12. C. (a) Increasing on (-?, -6) and (6, ?), decreasing on (-6, 0) and (0, 6) (b) Rel. max. f(-6) =12. rel. min. f(6) = 12. d. (a) Increasing on (-?, -6) and (6, ?), decreasing on (-6, 6) (b) Rel. max. f(-6) =12. rel. min. f(6) = 12.