Find the domain of the expression.
?
?
A. All real numbers x such that x = ?3
B. All real numbers x
C. All nonnegative real numbers x such that x ? 3
D. All real numbers x such that x ? 9
E. All real numbers x such that x ? 3
Answer: E
Mathematics
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Find the largest open interval where the function is changing as requested.Decreasing f(x) = - 
A. (-?, -3) B. (3, ?) C. (-?, 3) D. (-3, ?)
Mathematics
Solve.A building has an entry with the shape of a parabolic arch 6 ft high and 10 ft wide at the base. Find an equation for the parabola if the vertex is put at the origin of the coordinate system.A = 6 ftB = 10 ft
A. x2 = -16.7y B. x2 = -4.2y C. y2 = -16.7x D. y2 = -4.2x
Mathematics
Find the length of the line segment.
A. 2
B. 2
C. 12
D. 12
Mathematics
Multiply.
? 
A. 
B. 
C. 
D. 
Mathematics