Apply row operations to the augmented matrix to find the solution to the linear system.
A. x = 1, y = -5
B. x = 5, y = -1
C. x = -1, y = 5
D. x = -5, y = 1
Answer: D
Mathematics
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A. 
, 
B. 
, 
C. 
, 
D. 
, 
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Factor completely.2z2 - 21z + 54
A. (2z + 45)(2z - 9) B. (2z - 9)(9 - 2z) C. (2z - 9)(z + 6) D. (2z - 9)(z - 6)
Mathematics
Solve the equation and check the solution.
x = 2 + 
x
A. x = 60 B. x = 30 C. x = -60 D. x = -30
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Simplify the expression. Write the answer using positive exponents.(k6)-7(km)6
A. -k48m6
B. 
C. -k36m6
D. 
Mathematics