Provide an appropriate response.If x3 ? f(x) ? x for x in [-1,1], find 
f(x) if it exists.
A. does not exist
B. -1
C. 1
D. 0
Answer: D
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Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 + 7x + 10
A. Vertex: 
;
x-intercepts: (-2, 0) and (-5, 0);
y-intercept: (0, 10)
B. Vertex: 
;
x-intercepts: (2, 0) and (5, 0);
y-intercept: (0, 10)
C. Vertex: 
;
x-intercepts: (2, 0) and (5, 0);
y-intercept: (0, 10)
D. Vertex: 
;
x-intercepts: (-2, 0) and (-5, 0);
y-intercept: (0, 10)
Plot the set of numbers on a number line.
A. 
B. 
C. 
D. 
Factor the expression completely, if possible.49a3b + 42a2b + 9ab
A. ab(7a + 3)(7a - 3) B. ab(7a - 3)2 C. ab(7a + 3)2 D. Does not factor
Solve the problem.The polynomial 
measures the concentration of a dye in the bloodstream x seconds after it is injected. Does the concentration increase between 12 and 13 seconds?
A. No B. Yes