Give the equation of the function whose graph is described.The graph of y = 
is vertically stretched by a factor of 2, and the resulting graph is reflected across the x-axis.
A. y = 2
B. y = -2
C. y = -
D. y = -2
Answer: D
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Solve the problem.Find equations for the horizontal and vertical tangent lines to the curve 
A. Horizontal: y = 0 at (0, 0), y = 5 at 
; vertical: x = 
at 
, x = - 
at 
B. Horizontal: y = 
at 
, y = - 
at 
; vertical: x = 5 at (5, 0), x = 0 at 
C. Horizontal: y = 
at 
, y = - 
at 
; vertical: x = 0 at (0, 0), x = 5 at 
D. Horizontal: y = 5 at (5, 0), y = 0, 
; vertical: x = 
at 
, x = - 
at 
Factor the expression completely.6x2 - 150
A. 6(x - 5)2 B. 6(x + 5)(x - 5) C. (6x + 30)(x - 5) D. (6x + 5)(x - 30)
Determine the points at which the function is discontinuous. G(x) = 
A. -2, 10 B. (-?, -2] C. (-?, -2], 10 D. -2
Solve the problem.Frank can type a report in 4 hours. James takes 7 hours to type it. How long will it take the two of them typing together?
A. 
hours
B. 
hours
C. 9
hours
D. 2
hours