Use the substitution-of-variable technique to solve the system analytically.
+ 
= 
- 
= - 
A. {(4, -2)}
B. {(-2, 4)}
C. {(-5, 5)}
D. {(-4, 2)}
Answer: A
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Find the flux of the vector field F across the surface S in the indicated direction.F = xi + yj + z2k; S is portion of the cone z = 3
between z = 3 and z = 6; direction is outward
A. - 
B. 
?
C. 
?
D. - 
?
Solve the problem.Suppose that every element in the data set {x1, x2, x3, ..., xN} is positive. Further, suppose each element is first increased in value by 10% and then 1 is added to each of the resulting values. Which of the following is not true?
A. The median of the data set increases by 10%. B. The standard deviation of the data set increases by 10%. C. The range of the data set increases by 10%. D. The variance of the data set increases by 10%. E. all of these are true.
Solve the problem.A stack of poles has 25 poles in the bottom row, 24 poles in the next row, and so on, with 5 poles in the top row. How many poles are there in the stack?
A. 315 B. 290 C. 320 D. 310
Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 