**Similar Questions for How To Multiply Matrices 3x3 from ***Yahoo Answers***Question**How do I do this in Microsoft Excel?I need to multiply two matrices. A 3x3 and a1x3.
What Excel function/formula can I use to calculate the product so that I can get a 1x3 matrix in the end?
Thanks. I think I found it.

**Answer**Go into Excel and click on 'Help'. In the input box, type "multiply matrices".
You will be shown a number of functions that multiply matrices! :)

**Question**Can someone give me an example of a 3x3 matrices times a 3x2?I'm doing Algebra 2 homework and it's over Multiplying Matrices.
The problem I'm stuck on is a 3x3 times a 3x2. I don't wanna say the exact problem bc I want to learn how to do this actually. But could someone make up a problem with the same matrices and show how to solve it? I hope that makes sense.
Thanks :)
Oh and could you give detailed directions how to solve it please?
I mean like step by step.
Thanks again :)

**Answer**http://www.algebralab.org/lessons/lesson.aspx?file=algebra_matrices_multiplying.xml

**Question****Answer**By single-digit numbers, do you mean that the entries come from the set {0,1,2,3,4,5,6,7,8,9}? If so, then the maximum determinant is 1458. This the determinant of the matrix [0 9 9; 9 0 9; 9 9 0].
I wrote a computer program to try all combinations, using symmetry to cut down on the search space.
EDIT: It just occurred to me that every entry must be 0 or 9. If you fix the other eight entries, then the determinant is a linear function of the ninth entry, and the maximum value of a linear function occurs at an endpoint. So we only need to find the maximum determinant of a matrix of 0's and 1's, and multiply it by 9^3.
The maximum determinant of an n by n matrix of 0's and 1's is given by the following sequence: http://www.research.att.com/~njas/sequences/A003432