Combine the complex numbers.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
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Determine whether the given function is one-to-one. If it is one-to-one, find its inverse function.f(x) = 
A. one-to-one function; f-1(x) = 
B. one-to-one function; f-1(x) = 
C. one-to-one function; f-1(x) = -2x
D. not a one-to-one function
Solve the problem.BT&T charges $0.39 for the first minute and $0.20 for each additional minute for a long-distance call. How much will a 5 minute long-distance call cost?
A. $0.01 B. $1.95 C. $1.00 D. $1.19
Solve the system of equations.
A. x = z + 2 y = 2 - z z = any real number B. x = 2 - z y = z + 2 z = any real number C. inconsistent (no solution) D. x = z + 2 y = z - 2 z = any real number
Use the graph to find the horizontal asymptote, if any, of the function.
A. y = -4 B. y = 0 C. y = 4 D. none