Solve the linear system using an inverse matrix.
A. (3, -1)
B. (-3, 1)
C. (1, -3)
D. (-1, 3)
Answer: C
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Graph the equation. Include the coordinates of any local extreme points and inflection points.y = 2x3 - 3x2 - 12x
A. local minimum: (-2, 8)
local maximum: (0, 0)
inflection point: (-1, 4)
B. no extrema
inflection point: (0, 0)
C. local minimum: (2, -20)
local maximum: (-1, 7)
inflection point: 
D. local minimum: (3, -30)
no inflection point
Compute dy/dx for the function.y = sinh2 9x
A. 2 cosh 9x B. 18 sinh 9x cosh 9x C. 2 sinh 9x cosh 9x D. 18 cosh 9x
Find at least three nonzero terms [including a0, at least two cosine terms (if they are not all zero) and at least two sine terms (if they are not all zero)] of the Fourier series for the given function.f(x) = 
A. f(x) = 7 - 
B. f(x) = -7 + 
C. f(x) = -7 - 
D. f(x) = -7 - 
Solve.If y varies directly as x and y = 168 when x = 14, what is the value of y when x = 16?
A. 144 B. 192 C. 196 D. 256