In order for a matrix B to be the inverse of A, both equations AB D I and BA D I must be true. b. If A and B are n n and invertible, then A 1B 1 is the inverse of AB. c. If A D a b c d and ab cd ¤ 0; then A is invertible. d. If A is an invertible n n matrix, then the equation Ax D b is consistent for each b in Rn. e. Each elementary matrix is invertible.

Which is an accurate comparison of the two data sets? the commute to work is typically shorter and more consistent than the commute home. the commute to work is typically shorter but less consistent than the commute home. the commute to work is typically longer and less consistent than the commute home. the commute to work is typically longer but more consistent than the commute home.