Give the domain of the function.f(x) = 
A. (-?, 20) ? (20, ?)
B. (-?, 20]
C. [0, 20]
D. (-?, ?)
Answer: B
Mathematics
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Rationalize the denominator. Assume all variables have nonzero values.
A. 18
B. 
C. 
D. 
Mathematics
Solve the system of equations by substitution.
x + 
y = 32
x - 
y = 40
A. (100, -27) B. (-100, 27) C. (100, 27) D. (-100, -27)
Mathematics
Write as a decimal.0.87%
A. 0.0087 B. 0.087 C. 0.87 D. 0.0097
Mathematics
Determine any local or absolute extrema as indicated.Use the graph of f to estimate the absolute extrema.
A. Absolute maximum: 0; absolute minima: -2 and 2 B. Absolute maximum: ?; absolute minima: -2 and 2 C. Absolute maximum: ?; absolute minimum: -4 D. No absolute maximum; absolute minimum: -4
Mathematics