Solve the equation by completing the square.z2 + 16z + 43 = 0
A. {8 ± 
}
B. {-8 ± 
}
C. {8 + 
}
D. {-16 + 
}
Answer: B
Mathematics
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Factor.21x2 - 91x - 70
A. 21x2 - 91x - 70 B. (21x + 14)(x - 5) C. 7(3x + 2)(x - 5) D. 7(3x - 2)(x + 5)
Mathematics
Solve the system of equations.5x - 8y + 5z = -56-15x + 24y - 15z = 16815x - 24y + 15z = -168
A. {(x,y,z) | 15x - 24y + 15z = -56} B. {(x,y,z) | 5x - 8y + 5z = -56} C. {(-7, -3, -9)} D. ?
Mathematics
Find the product AB.A = 
, B = 
A.
[-13 49]
B. 
C. 
D. 
Mathematics
Graph the function.f(x) = 2- x - 1
A. 
B. 
C. 
D. 
Mathematics