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 total sales by type (wholesale and retail) and city (Chicago, Atlanta, and Memphis) for both years. ;

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 total sales by type (wholesale and retail) and city (Chicago, Atlanta, and Memphis) for both years. ​    ;  ​

Quizplus · Accepted Answer

To find the total sales by type and city for both years, we need to add corresponding elements of matrix A and matrix B, so the resulting matrix would have the same dimensions as matrix A and matrix B. The resulting matrix should have 2 rows for wholesale and retail, and 3 columns for Chicago, Atlanta, and Memphis. Therefore, the answer is D.

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