Solve the equation by completing the square.x2 + 4x - 9 = 0
A. {-1 - 
, -1 + 
}
B. {-2 - 1
, -2 + 1
}
C. {-2 - 
, -2 + 
}
D. {2 + 
}
Answer: C
Mathematics
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Provide an appropriate response.During a class test the estimated answer to 141 ? 95 varied. One student said 
a second student said 140 ? 90 = 12,600, and a third student estimated the answer to be 141 ? 90 = 12,690. Who do you think has the best answer?
What will be an ideal response?
Mathematics
Solve the system.x2 + 4x + y = 532x + y - 18 = 0
A. (5, 8), (-7, 32) B. (3, 12), (0, 53) C. (3, 12) D. (5, 8), (-9, 36)
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Mathematics
Simplify by combining pairs of like terms.16z - 6y - 19z - 2y
A. -3z - 4y B. -3z - 8y C. 3z - 4y D. 3z - 8y
Mathematics