Question

What is the size of the product?
[-7]
3 11
2

Answer 1

Given: The matrix shown

To Determine: The size of the product

Solution

Determine the product of the matrix as shown below

`3\begin{bmatrix}{} & {-7} & {} \\ {} & {11} & {} \\ {} & {2} & {}\end{bmatrix}=\begin{bmatrix}{} & {3*-7} & {} \\ {} & {3*11} & {} \\ {} & {3*2} & {}\end{bmatrix}=\begin{bmatrix}{} & {-21} & {} \\ {} & {33} & {} \\ {} & {6} & {}\end{bmatrix}`

State how to describe a matrix

A matrix can be described by the number of its rows by the number of its column

The product of the given matrix has 3 rows and one column