Simplify the expression. Assume that all variables are positive when they appear.
+ 12 - 
A. 15
B. 15 - 
C. 
+ 12 - 
D. 15 - 2
Answer: B
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Solve the problem.In order to pass a resolution on the village board, 
of the members must approve. If there are 9 members on the board, how many members must vote in favor of the resolution?
A. 8 members B. 5 members C. 7 members D. 6 members
Calculate the number of distinguishable strings that can be formed with the stated letters.5 m's and 5 n's
A. 10 B. 642 C. 252 D. 25
Evaluate using integration by parts.
Solve.The volume of a rectangular solid can be written as V=LWH, where L is the length of the solid, W is the width, and H is the height. A rectangular steel plate lying on a flat surface has a height (thickness) of 
inch. Its length is 3 inches longer than its width. The volume of the plate is 18 cubic inches. What are the length and width of the plate?
A. length = 9 in., width = 6 in. B. length = 10 in., width = 5 in. C. length = 10 in., width = 7 in. D. length = 8 in., width = 7 in.