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Peer reviewedDeMarr, 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
Peer reviewedAmir-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
Peer reviewedSchaefer, Paul – Journal of Computers in Mathematics and Science Teaching, 1989
Provides a program listing in True BASIC which constructs several kinds of matrices: (1) matrices with integral entries that have inverses that have integral entries; (2) matrices with integral entries that have inverses that are rational numbers with reasonable denominators; and (3) matrices with integral entries and prescribed integer…
Descriptors: Algebra, College Mathematics, Computer Oriented Programs, Computer Software
