Senior 3 Mathematics: Introduction to Matrices and Their Uses

These Senior 3 mathematics notes introduce matrices as arrangements of information in rows and columns. They explain element positions, matrix order, and row, column, zero and square matrices, with a discussion of diagonal entries and identity matrices. Examples connect matrices to classroom seating, biscuit packing and supermarket purchases. Practice tasks ask learners to classify matrices, state their orders, and represent quantities and prices using rectangular and column matrices. Several mathematical displays and example prices are missing from the supplied text, and the explanation of identity matrices requires correction.