Determine if the ordered pair is a solution to the system of linear inequalities in two variables.
(9, 2)
A. Yes
B. No
Answer: A
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Find the polar coordinates, 
and 
, of the point given in Cartesian coordinates.(0, -2)
A. (2, 0)
B. 
C. 
D. (2, ?)
Solve the problem.An exterminator activates an aerosol "fogger" in a large auditorium. The concentration of insecticide immediately afterwards can be modeled by the function C(x, y, z) = -0.0001 ln
,where x, y, and z are measured in feet from a particular floor-level corner of the room. To escape the insecticide, a flying insect located at 
needs to fly immediately in the direction of greatest decrease in concentration. Find the unit vector indicating the direction the insect should fly.
A. u = 
B. u = 
C. u = 
D. u = 
Multiply.
A. - 
B. 0
C. 
D. - 
Solve the system by using the inverse of the coefficient matrix.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. {(-1, 2, 1)} B. {(2, -1, 4)} C. ? D. {(2, 1, 6)}