SOLUTION: When finding the product, -2 0 1 4 3 2 -1 5 0 and -1 4 -2 0 -1 3 -2 0 -5 how many pairs of numbers must be multiplied together? 1. What is a square matrix?

Question 94014: When finding the product,
-2 0 1
4 3 2
-1 5 0
and
-1 4 -2
0 -1 3
-2 0 -5
how many pairs of numbers must be multiplied together?

1. What is a square matrix?
2. What is meant when a matrix is said to have dimensions "b" by "a"?
3. Under what conditions can two matrices be added?
4. What conditions are necessary in order to be able to multiply two matrices?
I am so desperate for help I am willing to pay you I just need someone to help me- PLEASE!!!!!!!!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
When finding the product,
-2 0 1
4 3 2
-1 5 0
and
-1 4 -2
0 -1 3
-2 0 -5
how many pairs of numbers must be multiplied together?
Each row has to multiply each column (9 actions)and each
multiplication involves 3 multiplied pairs
So there are 9*3 multiplied pairs = 27
-------------------------
1. What is a square matrix? : one that has an equal number of rows and columns.
-------------------------
2. What is meant when a matrix is said to have dimensions "b" by "a"?
It has "b rows and "a" columns.
---------------------------
3. Under what conditions can two matrices be added?
If they have the same dimensions: same number of rows and same number of columns.
---------------------------
4. What conditions are necessary in order to be able to multiply two matrices?
The number of columns of the left matrix must equal the number of rows of the
right matrix.
------------------------------
Cheers,
Stan H.

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