Exam 7: Matrix Algebra

Write A = if A is 2 × 3 and = 2i + j.

If A = ,B = ,and C = ,find BA - C.

What is the change in sales between 1995 and 1996?

=

Using the method of reduction,solve the system:

Find transpose of .

Find the inverse matrix of .

The spa staff determines that a client should take 140% of the RDA of vitamin A,140% of the RDA of vitamin C,and 190% of the RDA of vitamin D each day.How many tablets of each supplement should he take each day?

Perform the indicated operations and simplify your answer: + 2

Solve by the method of reduction:

Perform the indicated operations and simplify your answer: 3 - 4

Which of the following are reduced matrices?

If A = ,use row reduction to determine providing it exists.