Find the focus and directrix of the parabola.x2 = 4y
A. F: (1, 0); D: y = 1
B. F: (0, 1); D: y = -1
C. F: (0, -1); D: x = - 1
D. F: (1, 0); D: x = 1
Answer: B
Mathematics
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Find the product.-9ax6(9ax7 - 6x3 - 10)
A. -81ax7 + 54x3 + 90 B. -81a2x13 + 54ax9 C. -81a2x13 - 6x3 - 10 D. -81a2x13 + 54ax9 + 90ax6
Mathematics
Find the inverse of the function.f(x) = x2 - 4, x ? 0
A. f-1(x) = - 
B. f-1(x) = - 
C. f-1(x) = x2 + 4
D. f-1(x) = 
Mathematics
Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.11x2 - 4xy + 7y2 - 8x + 8y = 0
A. x = 
x' - 
y' and y = 
x' + 
y'
B. x = 
(x' - y') and y = 
(x' + y')
C. x = -y' and y = x'
D. x = 
x' - 
y' and y = 
x' + 
y'
Mathematics
Simplify.5(-26) + 8(-11)
A. 1870 B. 50 C. -218 D. 218
Mathematics