Given matrix A, find the indicated minor or cofactor.Find the cofactor A21.A = 
A. 21
B. -11
C. -21
D. 11
Answer: C
Mathematics
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A. 44x3 B. 88x3 C. 22x3 D. 66x3
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Use factoring techniques to solve the polynomial equation.x3 + 2x2 = 80x
A. {-10, 8} B. {-10, 0, 8} C. {10, -8} D. {10, 0, -8}
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Use an associative property to write an equivalent expression.(m ? 7) ? 2
A. (m ? 2) ? 7 B. 2(7m) C. (7m) ? 2 D. m14
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Solve the equation.3z + 18 = 2z + 6
A. 24 B. 12 C. -24 D. -12
Mathematics