Chapter 12 Flashcards
1
Q
When multiplying matrices.
A
Rows of the first must equal collums of the second.
2
Q
A matrix doesn’t have an inverse when its….
A
Determinant is 0
3
Q
Area of a triangle with a matrix
A
Add vortexes with 1 to make a 3x3 matrix
1/2 the absolute value of the determinant will yield the area of the triangle.
4
Q
Solving systems of inequalities with matrices.
A
Create the matrices. Then times (A^-1)XB to get the variables.
5
Q
When adding and subtracting, the matrices
A
Must be the same shape
