Sketch the graph of the equation. Identify the vertex and the intercepts.y = -x2 + 2x + 8
A. Vertex: (1, - 9);
x-intercepts: (-2, 0) and (4, 0);
y-intercept: (0, -8)
B. Vertex: (- 1, 9);
x-intercepts: (-4, 0) and (2, 0);
y-intercept: (0, 8)
C. Vertex: (1, 9);
x-intercepts: (-2, 0) and (4, 0);
y-intercept: (0, 8)
D. Vertex: (1, 9);
x-intercepts: (-4, 0) and (2, 0);
y-intercept: (0, 8)
Answer: C
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Factor the trigonometric expression and simplify.sin2x + sin2x cot2x
A. 1 B. cot2x - 1 C. cot2x + 1 D. sin2x + 1
Find the sum. Simplify when necessary.
+ 
A. - 
B. 0
C. - 
D. - 
Graph f as a solid line and f-1 as a dashed line in the same rectangular coordinate space. Use interval notation to give the domain and range of f and f-1.f(x) = 
+ 1
A. 
f domain = (-?, ?); range = (-?, ?)
f-1 domain = (-?, ?); range = (-?, ?)
B. 
f domain = (-?, ?); range = (-?, ?)
f-1 domain = (-?, ?); range = (-?, ?)
C. 
f domain = (-?, ?); range = (0, ?)
f-1 domain = (0, ?); range = (-?, ?)
D. 
f domain = (-?, ?); range = (-?, ?)
f-1 domain = (-?, ?); range = (-?, ?)
Find an equation of the line.Perpendicular to y = 3, through (2, 10)
A. x = 2
B. y = - 
x + 
C. x = - 
D. y = 10