Find all values of ? in [0°, 360°) that satisfy the equation.cos ? = 
A. {210°, 330°}
B. {60°, 300°}
C. {150°, 210°}
D. {60°, 120°}
Answer: B
Mathematics
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Find the prime factorization of the number.112
A. 2 ? 2 ? 2 ? 7 B. 2 ? 2 ? 2 ? 2 ? 7 C. 2 ? 2 ? 2 ? 2? 7 ? 7 D. 2 ? 2 ? 2 ? 7 ? 7
Mathematics
Solve the system by elimination. If the system is inconsistent or dependent, say so.
A. (20, 4) B. (4, 20) C. infinite number of solutions of the equation 5x + y = 40; dependent system D. empty set solution; inconsistent system
Mathematics
Subtract.-3 - (-12)
A. -3 B. -9 C. -15 D. 9
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 256 B. -4 C. 4 D. not a real number
Mathematics