Let matrix A represent the sales (in thousands of dollars) for the Walbash Company in 2004 in various cities, and let matrix B represent the sales (in thousands of dollars) for the same company in 2005 in the same cities. Write the matrix that represents the change in sales by type (wholesale and retail) and city (Chicago, Atlanta, and Memphis) from 2004 to 2005. ;
B)
C)

Question

Let matrix A represent the sales (in thousands of dollars) for the Walbash Company in 2004 in various cities, and let matrix B represent the sales (in thousands of dollars) for the same company in 2005 in the same cities. Write the matrix that represents the change in sales by type (wholesale and retail) and city (Chicago, Atlanta, and Memphis) from 2004 to 2005. ​  ​   ;  ​
B)​ 
C)​

Quizplus · Accepted Answer

In order to find the change in sales by type and city, we need to subtract the 2004 sales matrix A from the 2005 sales matrix B. The resulting matrix will have the same dimensions as A and B, and each entry will represent the change in sales for the corresponding type and city. Therefore, the correct answer is B.

Let Matrix a Represent the Sales (In Thousands of Dollars)