Identify the number as real, complex, pure imaginary, or nonreal complex. More than one of these descriptions may apply.
A. Complex, pure imaginary, nonreal complex
B. Complex
C. Real, complex
D. Nonreal complex
Answer: A
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Perform the indicated operation.
? 
A. 
B. 
C. 
D. 
Without graphing the function, determine its amplitude or period as requested.y = cos 3xFind the period.
A. 3
B. 1
C. 2?
D. 
Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z. 5x - y + z = 8 7x + y + z = 6
A. (-z + 3, 4z + 7, z)
B. 
C. 
D. no solution
Write the function as the composition of two functions f and g such that y = f[g(x)]).y = (x1/2 + 6)3 + 6(x1/2 + 6) 2 - 3
A. f(x) = x3 + 6x2 - 3, g(x) = x1/2 + 6 B. f(x) = (x + 6)3 + 6(x + 6) 2 - 3, g(x) = x1/2 + 6 C. f(x) = (x + 6)3 + 6x2 - 3, g(x) = x1/2 D. f(x) = x1/2 + 6, g(x) = x3 + 6x2 - 3