Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the semicircle y = 
A. 
= 
, 
= 0
B. 
= 
, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Answer: C
Mathematics
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Solve the inequality. Graph the results.7x - 4 ? 6x - 9
A. x ? -5 
B. x ? -5
C. x < 7 
D. x > 7 
Mathematics
Solve the equation by completing the square.x2 + 3x - 9 = 0
A. 
B. 
C. -3 ± 3
D. 
Mathematics
Compute the result.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Solve the problem.What is the domain of the sine function?
A. all real numbers
B. all real numbers, except odd multiples of 
(90°)
C. all real numbers, except integral multiples of ? (180°)
D. all real numbers from -1 to 1, inclusive
Mathematics