Find the center and radius of the circle.(x + 3)2 + (y - 2)2 = 81
A. (3, -2); 81
B. (2, -3); 9
C. (-3, 2); 9
D. (-2, 3); 81
Answer: C
Mathematics
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Add or subtract.
+ 
A. 
B. 
C. 
D. 
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Find the specified domain.For f(x) = 2x - 5 and g(x) = 
, what is the domain of (g ? f)?
A. [9, ?) B. [?,-2) C. (-9, 9) D. [-2, ?)
Mathematics
Solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.x + 3y + 2z = 11 4y + 9z = -12
A. 
B. 
C. 
D. 
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Write the expression in terms of its cofunction.sec 
A. sec 
B. csc 
C. cos 
D. sin 
Mathematics