Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. 2x + y + 2z - 4w = 10x + 3y + 2z - 11w = 173x + y + 7z - 21w = 0
A. {(w + 5, 8w + 4, -3w - 2, w)}
B. {(3w + 5, 6w + 6, -4w - 3, w)}
C. {(-3w + 5, 2w + 6, 4w - 3, w)}
D. {(w - 5, 8w - 4, -3w + 2, w)}
Answer: C
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A. 16 - 9x4y2 B. 16 - 9x4y C. 16 + 9x4y2 D. 16 - 9x4y4 E. 4 - 9x2y
Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant A to pollutant B.
A. 
B. 
C. 
D. 
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A. 292 mph with heading 274.6° B. 302 mph with heading 274.6° C. 292 mph with heading 273.8° D. 292 mph with heading 294.6° E. 302 mph with heading 294.6°
Answer the questionHow can the graph of f(x) = - 
- 4 be obtained from the graph of y = 
?
A. By reflecting across the y-axis and making a horizontal shift of 4 units to the left B. By making a horizontal shift of 1 unit to the right and a vertical shift of 4 units up C. By reflecting across the x-axis and making a vertical shift of 4 units down D. By making a horizontal shift of 4 units to the left and a vertical shift of 1 unit down