ABSTRACT
In engineering, physics and other applied fields a quantity having magnitude and direction is called a vector or a vector quantity. A physical quantity having only magnitude is called a scalar and is represented by a single number using appropriate units. Force, weight, velocity and acceleration are examples of vector quantities while mass, speed, and temperature are examples of scalar quantities. The chapter presents an introduction of matrices and their relationship with system of linear equations frequently occurring in diverse fields of study like physics, biology, chemistry, social science, medical science and different branches of engineering. Matrix theory or study of matrices provides compact way for representing systems of linear equations and yields efficient procedure for finding solutions.
