Solve the system using Gaussian elimination. 4x + y = 22 9x + 2y = 50
A. ?
B. {(-2, 6)}
C. {(6, -2)}
D. {(-2, -6)}
Answer: C
Mathematics
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Determine convergence or divergence of the alternating series.
A. Diverges B. Converges
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Use a grapher to graph the function.The displacement y of the end of a gear tooth is given by 
Sketch the graph of two cycles of y as a function of t in seconds. Label the point on the horizontal axis which represents the end of the second cycle.
A. 
B. 
C. 
D. 
Mathematics
Solve.The foundation for a cylindrical fountain is a cylinder with a diameter of 14 m and 4 m high. How many cubic m of concrete are needed to build the foundation? Use 3.14 as the approximate value of ?.
A. 615.44 m3 B. 1230.88 m3 C. 2461.76 m3 D. 351.68 m3
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Find the sum of the series.
A. 874 B. 873 C. 720 D. 21
Mathematics