Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = -9
B. x = 0, x = - 
C. x = -81
D. none
Answer: D
Mathematics
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Express the set using the roster notation. The set of the days of the week.
A. {Tuesday, Thursday} B. {Saturday, Sunday} C. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Sunday} D. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
Mathematics
Perform the indicated operations and express your answer in the form a + bi. 
A. ±4
B. -4i
C. 4i
D. -i
Mathematics
Identify the amplitude and phase shift for the equation.
?
?
A. Amplitude = 4
Phase shift = 
B. Amplitude = 1
Phase shift = 
C. Amplitude = 5
Phase shift = 
D. Amplitude = 4
Phase shift = 
E. Amplitude = 1
Phase shift = 
Mathematics
Determine whether the lines through each pair of points are parallel.(3, -8) and (-17, -18); (4, 6) and (-6, 1)
A. not parallel B. parallel
Mathematics