Solve the inequality. Write the solution in interval notation.
? 0
A. [-4, 0) ? (0, 4]
B. (-?, -4] ? (0, 4]
C. [-4, 0) ? [4, ?)
D. (-?, -4] ? [4, ?)
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Find the reference angle for the given angle.40°
A. 40° B. 130° C. 50° D. 140°
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Use a graphing utility to find the inverse of the matrix, if it exists. Round answers to two decimal places, if necessary.
A. 
B. 
C. 
D. 
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Mathematics