Solve the system of equations by finding the reduced row echelon form for the augmented matrix.2x + 8y + 8z = 96 x + 4y + 4z = -20 x +y +z = -6
A. (2, 1, -6)
B. (-6, 1, 2)
C. No solution
D. (-6, 2, 1)
Answer: C
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Find the volume of the solid generated by revolving the region about the y-axis.The region in the first quadrant bounded on the left by the circle x2 + y2 = 16, on the right by the line 
, and above by the line y = 4
A. 64?
B. 16?
C. 
?
D. 
?
Perform the indicated operation and reduce the answer to lowest terms.
- 
A. - 
B. - 
C. 
D. - 
Impedance is a measure of the opposition to the flow of current in an electrical circuit. It consists of two parts called resistance and reactance. Light bulbs add resistance to an electrical circuit, and reactance occurs when electricity passes through coils of a wire like those found in electric motors. Impedance Z in ohms (?) may be expressed as a complex number, where the real part represents the resistance and the imaginary part represents the reactance. Use this information to solve the problem.For two sections of a circuit connected in parallel, impedance is given by 
Calculate the impedance if 
alt="" style="vertical-align: -8.0px;" /> and 
A. 0.82 - 0.87i ?
B. 1.63 - 1.73i ?
C. 1.23 - 1.31i ?
D. 0.381 - 0.407i ?
Find a polynomial of degree 3 with real coefficients that satisfies the given conditions.Zeros of 1, -2, 3 and P(2) = 8
A. P(x) = 2x3 - 4x2 - 10x + 12 B. P(x) = 2x3 + 8x2 - 10x + 12 C. P(x) = -2x3 + 4x2 + 10x - 12 D. P(x) = -2x3 - 8x2 + 10x - 12