Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered pair. x + 7y = -23x + y = 34
A. (-2, 3)
B. (12, -2)
C. (7, 12)
D. (3, 7)
Answer: B
Mathematics
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Multiply and express the product as a mixed number or an integer.4 ? 
A. -16
B. -16
C. -16
D. -15
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Multiply the pair of monomials.(-4x9y2)(7x10y)
A. -28x19y2 B. -28x19y3 C. 3x19y3 D. 3x90y2
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Solve the system of equations using matrices. Use Gauss-Jordan elimination.
A. {(-3, 4, 6)} B. {(6, 4, -3)} C. {(3, 4, 7)} D. {(3, 7, 4)}
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Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. 
Mathematics