Question

The matrices show the number of different types of new and pre-owned vehicles that were sold at two different dealerships.

Two two by two matricies with values for cars and trucks by dealership



Which matrix shows how many different types of new and pre-owned vehicles were sold at both dealerships?

Responses

[12478]

Matrix with 2 rows and 2 columns. row 1 column 1 entry 12. row 1 column 2 entry 7. row 2 column 1 entry 4. row 2 column 2 entry 8.

[1771411]

Matrix with 2 rows and 2 columns. row 1 column 1 entry 17. row 1 column 2 entry 14. row 2 column 1 entry 7. row 2 column 2 entry 11.

[1772119]

Matrix with 2 rows and 2 columns. row 1 column 1 entry 17. row 1 column 2 entry 21. row 2 column 1 entry 7. row 2 column 2 entry 19.

[7173]

Matrix with 2 rows and 2 columns. row 1 column 1 entry 7. row 1 column 2 entry 7. row 2 column 1 entry 1. row 2 column 2 entry 3.

Answer 1

Add the corresponding entries of the two 2×2 matrices (new cars, new trucks; pre-owned cars, pre-owned trucks):

[12 7
4 8] + [5 7
3 3] = [17 14
7 11]

So the correct choice is [1771411].