Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + y + z= 7x - y + 2z=72x + 3z=14
A. {(- 
+ 7, 
, z)}
B. {(- 
+ 7, 2z, z)}
C. {(- 
- 7, 2z, z)}
D. {(- 
- 7, 
, z)}
Answer: A
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Graph the polar equation.r = 
A. 
B. 
C. 
D. 
Solve the problem.
Jeffrey Haas earns $4723.08 biweekly, is married, and claims 3 withholding allowances. Find his net earning for this pay period. Social security tax is 6.2% and Medicare tax is 1.45%.
A. $3705.35 B. $4361.77 C. $5018.19 D. $4066.66
Solve the problem.An electrician has to choose different types of wire for different applications. The size of the diameter of the wire is inversely related to the gauge of the wire. The chart below shows some different gauges of wire and their approximate diameters. Use the chart to answer the question. 
What is the gauge of the wire with a diameter of 
inch?
A. 16 gauge B. 12 gauge C. 10 gauge D. 14 gauge
Solve the inequality. Write the solution set in interval notation.3 + 
? 5
A. (-?, -2] ? [6, ?) B. [-2, 6] C. [-6, 2] D. (-?, -6] ? [2, ?)