Add or subtract, as indicated.(4x2y - 6xy) - (6x2y + 4xy2) - (2xy + 4xy2)
A. -6x2y - 4xy2 - 8xy
B. -2x2y - 8xy2 - 8xy
C. -2x2y + 8xy2 - 8xy
D. -2x2y + 8xy2 - 4xy
Answer: B
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a distance of 
unit in the direction of 
A. - 
B. - 
C. - 
D. - 
Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them. 2x + y = -1 4x + 2y = -2
A. Inconsistent B. x = -5, y =-2 C. x = 2, y = -5 D. x = -5, y = 2
Four players (A, B, C, and D) agree to divide a cake fairly using the lone divider method. The table below shows how each player values each of the four slices that have been cut by the divider.
Which of the following is a fair division of the cake?
A. A gets s2; B gets s1; C gets s3; D gets s4. B. A gets s3; B gets s1; C gets s4; D gets s2. C. A gets s2; B gets s4; C gets s3; D gets s1. D. A gets s3; B gets s2; C gets s4; D gets s1. E. none of these
Solve the problem.How many ways are there to choose 3 books from a collection of 12 different books?
A. 1320 B. 1980 C. 220 D. 22