Solve the problem.Write parametric equations for the tangent line to the curve of intersection of the surfaces 
and 
at the point 
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.The parabola x2 = -20y is shifted 4 units up and 7 units to the left. Find the focus and directrix of the new parabola.
A. Focus: (-7, 9); Directrix: y = 9 B. Focus: (-7, -1); Directrix: y = 9 C. Focus: (7, -9); Directrix: y = -9 D. Focus: (-7, -1); Directrix: y = -1
Solve the problem.Find an equation for the level surface of the function f(x, y, z) = 
d? - 
dt that passes through the point (0, ln 3, ln 4) .
A. ey + ez - 
= -1
B. ey - ez + 
= 1
C. ey + ez - 
= 1
D. ey - ez + 
= -1
Find a formula for the nth term of the sequence.-9, -7, -5, -3, -1 (every other integer starting with -9)
A. an = 2n - 11 B. an = 2n - 10 C. an = n - 19 D. an = n - 20
Write the improper fraction as a mixed number or a whole number.
A. 13
B. 
C. 14
D. 15