1. dependent system
a) a system that is dependent
b. a system that depends on a variable
c. a system that has no solution
d. a system for which the graphs coincide
2. Matrix
a) a movie
b) a maze
c) a rectangular array of numbers
d) coordinates in four dimensions
3. Sign array
a) the signs of the entries of matrix
b) the sign of the determinant
c) the signs of the answers
d) a matrix of + and - signs used in computing a determinant