Multiply. Write the answer as an improper fraction as needed.20 ? 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the requested partial derivative.(?w/?z)x,y at 
= 
if 
A. 48 B. 38 C. 33 D. 28
Mathematics
Write the equation in slope-intercept form.2x + 9y = 18
A. y = 
x + 2
B. y = 2x - 18
C. y = 
x - 2
D. y = - 
x + 2
Mathematics
Find the vertex, focus, and directrix of the parabola. Graph the parabola.y2 + 6y = 8x + 39
A. vertex: (-6, -3)
focus: (-6, -1)
directrix: y = -5
B. vertex: (-6, -3)
focus: (-6, -5)
directrix: y = -1
C. vertex: (-6, -3)
focus: (-8, -3)
directrix: x = -4
D. vertex: (-6, -3)
focus: (-4, -3)
directrix: x = -8
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 
A. f-1(x) = x3 + 27
B. f-1(x) = x3 - 27
C. f-1(x) = 
D. Not one-to-one
Mathematics