Multiply. Express your answer in standard form.
? 
A. 16
B. -16i
C. 16i2
D. -16
Answer: D
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Rotate the coordinate axes to change the given equation into an equation which has no cross product (xy) term. Identify the graph of the equation as a hyperbola, ellipse, parabola, a straight line, or parallel lines.3x2 + 2
xy + y2 - 9
x + 5y - 18 = 0
A. 4u2 - 
v2 - 11u + 7
v - 18 = 0; Hyperbola
B. 4u2 - 11u - 18 = 0; Parallel lines
C. 4u2 - 11u + 7
v - 18 = 0; Parabola
D. 4u2 + 
v2 - 11u + 7
v - 18 = 0; Ellipse
Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cotn-2 x - 
B. 
= 
cotn-1 x - 
C. 
= - cotn-1 x + 
D. 
= 
cotn-1 x + 
Determine the direction in which the parabola opens, and the vertex.x = -(y + 3)2 - 8
A. Opens to left; (-8, 3) B. Opens to left; (-3, -8) C. Opens to left; (-8, -3) D. Opens to right; (-3, -8)
The graph of two equations along with the points of intersection are given. Substitute the points of intersection into the systems of equations. Are the points of intersection solutions to the system of equations (Y/N)?
x2 = y -1y = -3x + 11
A. No B. Yes