Solve the equation in the real number system.x4 - 21x2 - 100 = 0
A. {-5, -2, 2, 5}
B. {-10, 10}
C. {-5, 5}
D. {-2, 2}
Answer: C
Mathematics
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Solve the system of equations by substitution, if a solution exists.
A. x = 3, y = 6 B. x = 4, y = 5 C. No solution D. x = -4, y = 6
Mathematics
Solve the inequality. Express your answer using interval notation.-3(4x - 4) < -15x - 6
A. (-?, -2]
B. (-6, ?)
C. (-?, -6]
D. (-?, -6)
Mathematics
Evaluate the expression, given x = -2, y = 3, and a = -4.
A. - 
B. 0
C. Undefined
D. 
Mathematics
Evaluate the determinant.
A. 32 - 2
B. -43
C. 32 + 2
D. 43
Mathematics