For the following expressions perform the indicated operations and simplify. Write the answers in 
form.
A. 
B. 
C. 6
D. 
6
E. None of these
Answer: B
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A waste water system is being installed in a small town.The large pipes required to reach from the town to the water treatment plant come in 20-foot and 24-foot lengths. The city planner finds that twelve fewer of the 24-foot pipes will be required than if the 20-foot pipes were used.What is the distance from the town to the water treatment plant?
What will be an ideal response?
Find the area of the figure below. (The area of a rectangle is the product of its length and width. The area of a triangle is 
the product of its base and height.)
A. 3
sq. cm
B. 2
sq. cm
C. 1
sq. cm
D. 4
sq. cm
Write a matrix equation equivalent to the system of equations. 3x + 7y = -4-4x - 2y = -4
A. 
=
B.
  = |
C.
=
D.
= 
Find the expected value of the probability density function to the nearest hundredth.f(x) = 
; [2, 8]
A. 5.00 B. 5.33 C. 6.50 D. 4.50