Solve the equation.If f(x) = 
x - 
, for what input is the output -4?
A. -21
B. 19
C. 21
D. -19
Answer: D
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Find the equation of the tangent plane (or tangent "hyperplane" for a function of three variables) at the given point p.f(x, y, z) = 3x2 - 3y2 + yz2, p = (-1, 1, -1)
A. w = -6x - 6y - 2z - 2 B. w = -6x - 5y - 2z + 4 C. w = -6x - 5y - 2z - 2 D. w = -6x - 5y + 2z - 2
Using Green's Theorem, find the outward flux of F across the closed curve C.F =(x2 + y2)i + (x - y)j ; C is the rectangle with vertices at (0, 0), (10, 0), (10, 5), and 
A. 300 B. -200 C. 550 D. 450
Estimate the answer by rounding as indicated.Estimate by rounding to the leftmost digit.
A. 8201 B. 8700 C. 8200 D. 8210
Find the x-intercept(s) of the graph of the equation. Graph the equation.y = x2 - 5x + 1
A. x-intercepts: none
B. x-intercepts: 
C. x-intercepts: 
D. x-intercepts: -1 and 5