Determine the value or values of the variable where the expression is defined.
A. all real numbers except x = -8
B. all real numbers except x = 8
C. all real numbers except x = 0
D. all real numbers
Answer: B
Mathematics
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Find the reciprocal.
A. 0
B. 
C. 20
D. 1
Mathematics
Determine the equation of the vertical asymptote for the graph of this function, and state the domain and range of this function.f(x) = ln(x + 3)
A. Vertical asymptote: x = 3; Domain: (-3, ?), Range: (-3, ?) B. Vertical asymptote: x = -3; Domain: (3, ?), Range: (3, ?) C. Vertical asymptote: x = -3; Domain: (-3, ?), Range: (-?, ?) D. Vertical asymptote: x = 3; Domain: (3, ?), Range: (-?, ?)
Mathematics
Solve the problem.Solve the formula V = 
?r2h + 
?hrR + 
?hR2 for r.
A. r = 
B. r = 
C. r = ±
D. r = 
Mathematics
Solve by completing the square.7x2 + 21x = - 14
A. - 
, 
B. - 2, - 1
C. 1, 2
D. no real-number solution
Mathematics