Solve the inequality. Give the solution set in both interval and graph forms.9x - 1 < -19 and -5 - 6x > 1
A. (-?, -2) ? (-1, ?)
B. (-2, -1)
C. (-?, -1)
D. (-?, -2)
Answer: D
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Solve the problem.Find the centroid of the first-octant portion of a solid ball of radius 2 centered at the origin.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Write an equation in slope-intercept form of a line satisfying the set of conditions.Through (-8, 3), perpendicular to -2x - 5y = 31
A. y = 
x + 
B. y = 
x + 
C. y = - 
x + 23
D. y = 
x + 23
Graph the inverse of the function plotted, on the same set of axes. Use a dashed curve for the inverse.
A. Function is its own inverse.
B. 
C. 
D. 
Find the vertex, focus, and directrix of the parabola with the given equation.(x - 4)2 = -20(y + 3)
A. vertex: (4, -3) focus: (4, -8) directrix: y = 2 B. vertex: (-3, 4) focus: (-3, -1) directrix: y = 9 C. vertex: (-4, 3) focus: (-4, -2) directrix: y = 8 D. vertex: (4, -3) focus: (4, 2) directrix: x = -8