A Matrix is an array of numbers: A Matrix (This one has 2 Rows and 3 Columns). To multiply a matrix by a single number, we multiply it by every...

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

One of the last examples on Systems of Linear Equations was this one: x + y + z = 6. 2y + 5z = 4. 2x + 5y z = 27.

4×0.6+7×−0.2 4×−0.7+7×0.4 2×0.6+6×−0.2 2×−0.7+6×0.4

Enter your matrix in the cells below A or B. ... Or you can type in the big output area and press to A or to B (the calculator will try its best to interpret your data).

Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents.

Also called Dirac Notation. ... Bra-Ket is a way of writing special vectors used in Quantum Physics that looks like this

A vector has magnitude (how long it is) and direction ... Here are two vectors

Wow! What a mouthful of words! But the ideas are simple. The Commutative Laws say we can swap numbers over and still get the same answer ...

They have many uses ... A simple example is that an eigenvector does not change direction in a transformation ... How do we find that vector?