Use the given values of the variables to find the value of the expression.  for x = -6, y = 9

A. - 
B.  
C.  
D. -  


Answer: D

Mathematics

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Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(2) = 8, u '(2) = 2, v(2) = -1, v '(2) = -5. (2u - 4v) at x = 2

A. 20 B. 24 C. 12 D. -16

Mathematics

Solve the system.x + y = 3x- z = -2 y + 3z = 11

A. {(1, 2, 3)} B. {(-1, 2, -3)} C. ? D. {(0, 1, 2)}

Mathematics

Solve the problem.When air friction is considered, the time t (in s) it takes a certain falling object to attain a velocity v (in ft/s) is given by  Find an expression for dt/dv in terms of v.

A. 5 ln 
B.
C.
D.

Mathematics

Multiply.(7i)(-10i)

A. -17 B. -70 C. 17 D. 70

Mathematics