Solve the system of equations by the substitution method.

A. (16, -4)
B. (-4, 16)
C. infinite number of solutions
D. no solution


Answer: A

Mathematics

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Evaluate the expression for the given value of x. ?

A.
B.
C.
D. 48
E. -48

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Find the derivative of the function.y = 

A. y' = 
B. y' = 
C. y' = 
D. y' = 

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Find f'(x) for the function, then find f'(x) for the given x.f(x) = - , f'(2)

A. f'(x) = 3x2; f'(2) = 12 
B. f'(x) = ; f'(2) = 
C. f'(x) = - ; f'(2) = - 
D. f'(x) = 3x; f'(2) = 6

Mathematics

Establish the identity.cot(x + y) cot(x - y) = 

What will be an ideal response?

Mathematics