Multiply.(5x + 12y)2
A. 25x2 + 120xy + 144y2
B. 5x2 + 144y2
C. 25x2 + 144y2
D. 5x2 + 120xy + 144y2
Answer: A
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Solve the problem.Find a unit vector perpendicular to plane PQR determined by the points P(2, 1, 3), Q(1, 1, 2) and R(2, 2, 1).
A. 
(-i - 2j - k)
B. 
(i - 2j - k)
C. 
(i - 2j + k)
D. 
(i - 2j - 2k)
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.xy - 9x + y - 6 = 0
A. 
u2 - y'2 - 4
u + 
v - 6 = 0 ; Hyperbola
B. 
u2 + 
v2 - 4
u + 5
v - 6 = 0 ; Ellipse
C. 
u2 - 4
u + 5
v - 6 = 0 ; Parabola
D. 
u2 - 
v2 - 4
u + 5
v - 6 = 0 ; Hyperbola
Graph the system of inequalities. Find the coordinates of any vertices.3y + x ? 0,y + 2x ? 10,y ? 0
A. 
(0, 0) , (10, 0)
B. 
(6, -2)
C. 
(0, 0) , (5, 0) , (6, -2)
D. 
(0, 0) , (5,0)
Identify the fraction as a proper fraction or an improper fraction.
A. Proper fraction B. Improper fraction