Matrices Flashcards
1
Q
What is a matrix?
A
A way to organize #’s
2
Q
Explain how to add or subtract
A
make sure the same dimension, then add each # to the other # in the same slot.
3
Q
What is a dimension?
A
2x2, 3x5, etc. *1st # is the column, 2nd # is the row
4
Q
how to find the inverse?
A
1/ad-bc
5
Q
how to multiply matrices?
A
multiply each column of the first matrix with the row of the second matrix
6
Q
what is a scalar?
A
a # that all the #’s in the matrix are multiplied with
