Solve by the substitution method.-4x + 7y = -28 -2x - 2y = 8

A. ?
B. {(0, -4)}
C. {(0, -3)}
D. {(-1, -3)}


Answer: B

Mathematics

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A.
B.
C.
D.

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Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 5, at the point (2, 1)

A.  = - 2;  = 1
B.  = 2;  = 5
C.  = - 2;  = -5
D.  = -  = 0

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A. (-?, -2] ? 
B.
C.
D. [-2, 0) ? 

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Write the equation of a sine function that has the given characteristics.The graph of y = , shifted 8 units upward

A. y = 
B. y =  + 8
C. y = 
D. y =  - 8

Mathematics