Algebra 2 help

Question

1.     The first matrix shows the cost of two types of sweaters (in dollars), and the second matrix shows the number of each type sold during different months.         

                                                         Button          Zipper                                  Nov.        Dec.        Jan.      Feb.

                                      Cost        [     22                 18]                    Button.     [  5              18           32          40]

                                                                                                          Zipper      [ 25              40           38         12]

(a)   Multiply the matrices.

(b)   How much more money was spent on sweaters sold in January than in December? Tell how to use your answer from part a to answer this question.

Answer:

 

 

Answer 1

The cost of two types of sweaters is

The number of each type sold period of different months.

a)

Multiply the matrices, Find matrix A.

The matrix multiplication did not possible to three matrices.

b)

Did not possible to answered this question.