Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x - y + 3z = -114x + z = -2 x + 3y + z = 13
A. (-2, 0, 5)
B. No solution
C. (-2, 5, 0)
D. (0, 5, -2)
Answer: D
Mathematics
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Place parentheses, if needed, to turn this into a true statement.8 - 10 - 9 + 3 = 10
A. 8 - (10 - 9) + 3 = 10 B. No parentheses needed C. 8 + 10 - (9 + 3) = 10 D. (8 - 10) - 9 + 3 = 10
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Find the exact value of the sum.sin 
- sin 
A. - 
B. - 
C. - 
D. - 
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Determine if the complete graph represents a function that is even, odd, or neither.
A. even B. neither C. odd
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Evaluate the combination.
A. 8 B. 40,320 C. 10,080 D. 4
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