Find the slope of the line tangent to the graph of the function at the given value of x.y = -8x-1 + 5x-2; x = 2
A. 
B. - 
C. - 
D. 
Answer: D
Mathematics
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The scalar function div(grad f) = ? ? ? f (also written ?2f) is called the Lapalacian, and the function f satisfying ?2f = 0 is said to be harmonic. ?2f = fxx + fyy + fzz. Find ?2f for the following function and decide if it is harmonic.f(x, y, z) = (x3 + y2 + z)2
A. harmonic B. not harmonic
Mathematics
Find the derivative.
A. 
B. 
C. 
D. 
Mathematics
Solve the system by substitution.
+ 
= 4
- 2y = 21
A. {(6, 8)} B. {(-6, 8)} C. {(6, -8)} D. {(-6, -8)}
Mathematics
Graph the equation using the slope and the y-intercept.y = 
x - 1
A. 
B. 
C. 
D. 
Mathematics