Write the augmented matrix for the system of equations.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Factor the polynomial completely using grouping.4x2 + 12x + 9
A. (4x + 3)(x + 3) B. (2x - 3)(2x - 3) C. (2x + 3)(2x + 3) D. prime
Mathematics
Write the conjugate 
of the complex number z. Then find z
.z = -9 - i
A. 
= -9 + i, z
= 81
B. 
= -9 + i, z
= -80
C. 
= -9 + i, z
= 82
D. 
= -9 + i, z
= -9
Mathematics
Find the exact value of the expression. Do not use a calculator.cot 45° - cos 45°
A. - 
B. 
C. 
D. 
Mathematics
Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter.
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Mathematics