Solve.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (0, 6, -1)
B. (0, -6, 1)
C. (-3, 0, 4)
D. (3, 0, -4)
Answer: B
Mathematics
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Subtract.(0.7x4 - 0.8x3 + 0.9) - (4.6x4 + 2.1x - 1.3)
A. -3.9x4 - 0.8x3 - 2.1x + 2.2 B. -3.9x4 - 0.9x3 - 0.4 C. -3.9x4 - 0.8x3 - 2.1x - 0.4 D. -3.9x4 - 0.8x3 + 2.1x + 2.2
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Simplify the expression using the order of operations.9 + 9 ÷ 3 ? 4 - 2
A. 58 B. 22 C. 23 D. 19
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Evaluate.- 
? 
A. - 
B. 
C. 
D. - 
Mathematics
Factor by grouping.2x3 - 6x2 + 7x - 21
A. (x + 3)(2x2 + 7) B. (x - 3)(2x2 - 7) C. (x - 3)(2x + 7) D. (x - 3)(2x2 + 7)
Mathematics