Solve the equation and check the solution.
x + 
= - 
x - 
A. x = - 
B. x = - 
C. x = 
D. x = - 
Answer: A
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Graph the linear function and give the domain and range.h(x) = -6x
A. D = (-?, ?),
R = (-?, ?)
B. D = (-?, ?),
R = (-?, ?)
Find the linear approximating polynomial for the function centered at a.f(x) = 
, a = 0
A. p1(x) = - 
x
B. p1(x) = 
x
C. p1(x) = 
x
D. p1(x) = - 
x
Find the limit, if it exists.
A. 12 B. 2 C. Does not exist D. 120
Beams of light parallel to the axis of the parabolic mirror shown in the figure strike the mirror and are reflected. Find the distance from the vertex to the point where the beams concentrate.
?
a = 12 ft, b = 8 ft
?
?
A. The focus is 32 in. from the vertex on the axis of the parabola. B. The focus is 16 in. from the vertex on the axis of the parabola. C. The focus is 12 in. from the vertex on the axis of the parabola. D. The focus is 8 in. from the vertex on the axis of the parabola.