Graph the function f(x)=-2x²-2.






Mathematics

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Find all the second order partial derivatives of the given function.f(x, y) = 

A.  = -  =  ;   =  =  
B.  = -  =  ;   =  =  
C.  = -  =  ;   =  =  
D.  =  = - ;   =  =  

Mathematics

Solve.What is 3387 plus 548 plus 70?

A. 3942 B. 4015 C. 3905 D. 4005

Mathematics

Evaluate.82 - 4 ? 9

A. 28 B. 144 C. 540 D. 288

Mathematics

Find the solutions to the system of equations by the addition method. 7x + 9y = -45 2x + 3y = -15

A. (0, -5) B. (-1, -4) C. (-1, -5) D. (0, -4)

Mathematics