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