Write a direct variation equation, y = kx, that satisfies the ordered pairs in the table.
A. y = 
x
B. y = -4x
C. y = - 
x
D. y = 
x
Answer: C
Mathematics
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Find the principal unit normal vector N for the curve r(t).r(t) = (6 sin t)i + (6 cos t)j + 9k
A. N = (sin t)i + (cos t)j B. N = (-sin t)i + (cos t)j C. N = (-sin t)i - (cos t)j D. N = (-cos t)i - (sin t)j
Mathematics
Use the quadratic formula to solve the quadratic equation.
p2 - 6p + 
= 0
A. p = 
B. p = 
C. p = 
D. p = 
Mathematics
Use the multiplication principle to solve the equation.
= 18
A. -126 B. -108 C. -119 D. -25
Mathematics
Graph the ellipse. Give the coordinates of the center, as well as the values of a and b.
+ 
= 1
A. center (-2, 4), a = 2, b = 4
B. center (2, -4), a = 2, b = 4
C. center (-2, -4), a = 2, b = 4
D. center (2, 4), a = 2, b = 4
Mathematics