Complete the sentence so the result is an identity. Let x be any real number. = 
A. csc x
B. sec x
C. tan x
D. cot x
Answer: A
Mathematics
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Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 
- 
A. -6
B. -42
C. -6
D. 12
Mathematics
Integrate the function f over the given region.f(x, y) = y2 ex4 over the triangular region in the first quadrant bounded by the lines 
and 
A. 
e
B. 27(e + 1)
C. 9(e - 1)
D. 
(e - 1)
Mathematics
Evaluate the expression for the given replacement values.x - y + z for x = 18, y = 8, z = 5
A. 5 B. 31 C. 15 D. 16
Mathematics
Find the requested value.f(x) = -2x - 4, g(x) = -4x2 - 5x - 1Find 
(3).
A. - 
B. 
C. 
D. 
Mathematics