Use the determinant feature of a graphing calculator to solve the system by Cramer's rule . (Round to one decimal place.)2.7x - 2.1y + 4.0z = 3.14.1x - 7.0y + 0.2z = -5.04.1x - 2.5y + 3.3z = 7.1
A. {(28.6, 22.4, -1.3)}
B. {(3.6, 2.8, -0.2)}
C. {(7.1, 5.6, -0.3)}
D. {(14.3, 11.2, -0.7)}
Answer: B
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State whether the function is linear or quadratic.f(x) = 12x + 3x2
A. Linear B. Quadratic
Graph the equation. Include the coordinates of any local and absolute extreme points and inflection points.y = x + cos 2x, 0 ? x ? ?
A. local minimum: (1.444, -0.246)
local maximum: (0.126, 1.031)
inflection points: (0.785, 0.393), (2.356, 1.178)
B. local minimum: 
local maximum: 
inflection point: 
C. no local extrema
inflection point: 
D. local minimum: 
local maximum: 
inflection points: 
, 
Graph the linear inequality.-3x - 5y ? 15
A. 
B. 
C. 
D. 
Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.cos2 x + 2 cos x + 1 = 0
A. 
B. 
, 
C. ?
D. 
, 