Find the equation of the tangent line to the curve when x has the given value.f(x) = 
- 
+ 4 ; x = 3
A. y = -7x + 28
B. y = -7x - 9
C. y = 
+ 1
D. y = 
- 
Answer: D
Mathematics
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Graph the circle.x2 + y2 - 8x - 6y + 16 = 0
A. 
B. 
C. 
D. 
Mathematics
If the following defines a one-to-one function, find its inverse. If not, write "Not one-to-one."{(-2, 4), (2, -4), (8, -2), (-8, 2)}
A. {(4, -2), (-4, 2), (-2, -8), (2, 8)} B. Not one-to-one C. {(4, -2), (-4, 2), (8, -2), (2, -8)} D. {(4, -2), (-4, 2), (-2, 8), (2, -8)}
Mathematics
Solve the system of equations.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (-3, 0, 4) B. (0, -6, 1) C. (0, 6, -1) D. (3, 0, -4)
Mathematics
Differentiate.
A. 
B. cos x
C. 
cos x - 
sin x
D. none of these
Mathematics