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Problem Solving Involving Systems of Linear Equations with Free Variables.
Peer reviewed Peer reviewed
DeMarr, Ralph E.; Gonzales, Nancy A. – School Science and Mathematics, 1991
A sample of novel verbal problems which can be solved by using systems of linear equations with free variables is presented. The procedure of Gaussian elimination is used to solve the system. (KR)
Descriptors: Algebra, Mathematical Applications, Mathematical Formulas, Mathematics Education
Proper Values of Matrices and Some Applications.
Peer reviewed Peer reviewed
Amir-Moez, Ali R. – School Science and Mathematics, 1992
Presents a short study of proper values of two-by-two matrices with real entries. Gives examples of symmetric matrices and applications to systems of linear equations of perpendicular lines intersecting at the origin and central conics rotated about the origin to eliminate the xy term from its equation. (MDH)
Descriptors: Analytic Geometry, Mathematical Applications, Mathematical Formulas, Mathematics Education