Graph the ellipse and locate the foci.9x2 + 16y2 = 144
A. foci at (
, 0) and (-
, 0)
B. foci at (4, 0) and (-4, 0)
C. foci at (0, 
) and (0, -
)
D. foci at (5, 0) and (-5, 0)
Answer: A
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Verify that the curve r(t) lies on the surface. Give the name of the surface.r(t) = 
; z=x2 + y2
A. 3t = 3t cos2t + 3t sin2t; elliptic cylinder B. 3t = 3t cos2t + 3t sin2t; paraboloid C. 3t = 3t cos2t + 3t sin2t; ellipsoid D. 3t = 3t cos2t + 3t sin2t; hyperboloid
Provide an appropriate response.Write a system of equations that would be more easily solved using the elimination method than the substitution method. Explain why elimination would be easier than substitution.
What will be an ideal response?
For the function, find the average rate of change of f from 1 to x: 
f(x) = 
A. 
B. 
C. 
D. 
Determine whether the ordered pair is a solution to the linear inequality.y > -x - 7; (2, -6)
A. Yes B. No