Solve the system by the elimination method.2x + 4y = 0-8x - 16y = -0
A. {(2, 3)}
B. {(3, -5)}
C. ?
D. {(x, y)| 2x + 4y = 0}
Answer: D
Mathematics
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Determine convergence or divergence of the alternating series.
A. Diverges B. Converges
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the curve y = 
and the x-axis from x = 1 to x = 9, with density ?(x) = 
A. 
= 
, 
= 
B. 
= 5, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
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Write the expression in the standard form a + bi.(6 + 5i)(6 - 5i)
A. 36 - 25i B. 61 C. 36 - 25i2 D. 11
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Solve the problem.BJ can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A. 12 hr B. 8 hr C. 90 hr D. 20 hr
Mathematics