Use the discriminant to determine whether the graph of the equation is an ellipse (or circle), a hyperbola, or a parabola.3x2 + 3xy - 9y2 + 4x - 2y + 9 = 0
A. Hyperbola
B. Ellipse or circle
C. Parabola
Answer: A
Mathematics
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Evaluate the integral.
6x dx
A. 
x cot 6x - 
ln 
+ C
B. - x cot 6x + ln 
+ C
C. - 6x cot 6x + 36 ln 
+ C
D. - 
x cot 6x + 
ln 
+ C
Mathematics
Find the first term and the common difference.524, 513, 502, 491, . . .
A. a1 = 524, d = -524 B. a1 = 524, d = 524 C. a1 = 524, d = -11 D. a1 = 524, d = 11
Mathematics
Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by 
and the 
from 
to 
about the 
A. 10?ln 5 B. 2?(5ln 5 - 4) C. 5?ln 5 D. 2?(5ln 5 - 5)
Mathematics
Represent the sets on a number line.{x|x ? 2}
A. 
B. 
C. 
D. 
Mathematics