Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = -x2 - 4x - 7
A. maximum at (- 2, - 3)
B. maximum at (3, 2)
C. minimum at (0, 2)
D. minimum at (3, 0)
Answer: A
Mathematics
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Write as a mixed number and simplify.
A. 3
B. 2
C. 
D. 1
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Change the polar coordinates (r, ?) to rectangular coordinates (x, y).(9, 330°)
A. 
B. 
C. 
D. 
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Find the requested angle.The supplement of 159°.
A. 66° B. 201° C. 21° D. 111°
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Solve the problem.What is the domain of the cosine function?
A. all real numbers from -1 to 1, inclusive
B. all real numbers, except integral multiples of ? (180°)
C. all real numbers
D. all real numbers, except odd multiples of 
(90°)
Mathematics