Find the direction angles of the vector. Round to the nearest degree, if necessary.v = 2i - 3j - 4k
A. ? = 68°, ? = 124°, ? = 138°
B. ? = 65°, ? = 129°, ? = 147°
C. ? = 61°, ? = 137°, ? = 166°
D. ? = 67°, ? = 125°, ? = 140°
Answer: A
Mathematics
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Given f(x) and g(x), find 
.f(x) = x2 + 14x + 45 and g(x) = x + 5
A. 
= x + 9
B. 
= x - 5
C. 
= x + 5
D. 
= x - 9
Mathematics
Find the x- and y-intercepts.f(x) = 5x2 + 12x + 6
A. 
, (0, -6)
B. 
, (0, 6)
C. 
, (0, 6)
D. 
, (0, -6)
Mathematics
Find the expected value of the probability density function to the nearest hundredth.f(x) = 1 - 
; [1, 4]
A. 2.50 B. 2.67 C. 2.83 D. 3.00
Mathematics
Solve the equation for exact solutions.arccos x + arccos 2x = arccos 
A. 
B. 
C. 
D. 
Mathematics