Determine whether the relation defines y as a function of x. Give the domain.y = 
A. Function; domain (-?, -7) ? (-7, ?)
B. Not a function; domain: (-?, ?)
C. Not a function; domain (-?, 11) ? (11, ?)
D. Function; domain: (-?, ?)
Answer: D
Mathematics
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Solve the problem.The vertex and focus of one parabola are, respectively, the focus and vertex of a second parabola. If 
is the equation of one parabola, find the points of intersection of the two parabolas.
A. 
and 
B. (16, -16) and (16, 16)
C. 
and 
D. (4, -16) and (4, 16)
Mathematics
Find the opposite (additive inverse) of the number.
A. 3
B. - 
C. 
D. 
Mathematics
Subtract and check.
A. 221,114 B. 222,104 C. 221,104 D. 321,104
Mathematics
Subtract.0 - 2
A. 
B. -2
C. 0
D. 2
Mathematics