Start with the following matrix: 10 -9 -10 -10 -5 1 -6 5 Perform the following 3 elementary row operations, one after the other, and give the resulting matrix at each step: You can resize a matrix (when appropriate) by clicking and dragging the bottom-right corner of the matrix. a) Add 8 times row 2 to row 3 00 000 000 b) Multiply row 1 by -5 000 000 0 0 0 c) Interchange rows 2 and 1 000 00

Simplify the following matrix expression (A -B) (A+B)- (A+6) 2.

The table below represents the data for the salaries of 4 secretarial workers at a local law firm. The first row represents each employee's wage per hour, and the next 6 rows represent the amount of hours each person worked for the corresponding days of this 1 week time period. (The law firm is closed on Sundays) Use matrix multiplication to find the amount of money this law firms paid their secretaries each day of the week.

Please show all work when answering the following question. This is an unsolved and ungraded example from lecture