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what is a linear system
2 equations with 2 possible outcomes
one solution for a linear system
it is in the form (x, y)
no solution for a linear system
it is a false statement and the lines are parallel
infinitely many solutions for a linear system
true statement (0=0)
what must be the same too add or subtract matrices
the dimensions
what must be the same to multiply or divide two matrices?
the columns of the first matrix must be equal to the number of rows in the second matrix
inverse of matrices?
1/ad-bc times (d/-c -b/a)
singular
if a matrix has no inverse
nonsingular
if a matrix has an inverse
inverse of a square matrix
AB=BA=Inverse
identity matrix
1’s on the diagonals and 0’s everywhere else
Note
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