Solve using matrices.-2x - y + 6z = -8-6x - 6z = -54 7y + z = 44
A. (7, 2, 6)
B. (7, 6, 2)
C. (-7, 6, 14)
D. (6, 2, 7)
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Solve the problem.A rectangular pool 3.1 m by 6.3 m is surrounded by a 1.7 m wide sidewalk. Find the area of the sidewalk.
A. 21.76 m2 B. 43.52 m2 C. 19.53 m2 D. 32.4 m2
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Multiply or divide the fractions. Reduce to simplest form.
÷ 
A. 
B. 
C. z - 9
D. 
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Solve the equation.2r + 2 = 20
A. 16 B. 20 C. 8 D. 9
Mathematics