122 Videos for "systems of equations"

Mixture Problems  Concept
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems when mixing two quantities with different prices. 
Sum of Digits  Concept
Math › Algebra › Word Problems Using Systems of Equations
How to solve a problem when asked to switch the digits of a 2digit number. 
Percent Concentrations  Concept
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems about mixing two liquids with different percent concentrations. 
Percent Concentrations  Problem 3
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems about mixing two liquids with different percent concentrations and one of the ingredients is "pure." 
Percent Concentrations  Problem 2
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems about mixing two liquids with different percent concentrations and the concentration of the mixture is unknown. 
Sum of Digits  Problem 2
Math › Algebra › Word Problems Using Systems of Equations
How to solve a problem when asked to switch the digits of a 2digit number and one digit is zero. 
Mixture Problems  Problem 1
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems when mixing two quantities with different prices and the price of the mix is unknown. 
Sum of Digits  Problem 1
Math › Algebra › Word Problems Using Systems of Equations
How to solve a problem when asked to switch the digits of a 2digit number and the result is more than the original. 
Percent Concentrations  Problem 1
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems about mixing two liquids with different percent concentrations and the quantity of one ingredient is unknown. 
Mixture Problems  Problem 2
Math › Algebra › Word Problems Using Systems of Equations
How to solve word problems when mixing two quantities with different prices and the amount of one ingredient is unknown. 
Rectangular Coordinate System  Concept
Math › Algebra 2 › Graphs of Linear Equations
How to talk about the rectangular coordinate system. 
The Identity Matrix  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to determine the identity matrix of order n. 
The Inverse of a Square Matrix  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to determine whether two matrices are inverses. 
2x2 Determinants  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to compute the determinant of a 2x2 square matrix. 
Square Matrices  Problem 1
Math › Precalculus › Systems of Linear Equations and Matrices
How to demonstrate that matrix multiplication is not commutative. 
Area With Determinants  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to compute the area of a parallelogram using a determinant. 
The Cross Product of Vectors  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to compute the cross product of two 3D vectors. 
Introduction to the 3D Coordinate System  Problem 2
Math › Precalculus › Vectors and Parametric Equations
How to find the equation of a sphere with radius r when it is centered at the origin. 
Area With Determinants  Problem 1
Math › Precalculus › Systems of Linear Equations and Matrices
How to compute the area of a triangle using a determinant. 
Simplifying Determinants  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to simplify determinants using three row (or column) operations.