adding a multiple of one row to another 100 videos

Adding Vectors
Precalculus Vectors and Parametric Equations
How to add vectors geometrically two ways.
Displacement Vector Addition Head to Tail Method Parallelogram Method 
Square Matrices
Precalculus Systems of Linear Equations and Matrices
How to determine whether two matrices can be multiplied, and if so, what the dimensions of the product will be.
matrices rows columns dimension matrix multiplication 
Augmented Matrices
Algebra 2 Matrices
How to use matrices to solve a system of linear equations.
augmented matrix row operations scalar multiple 
Addition and Scalar Multiplication of Vectors
Precalculus Vectors and Parametric Equations
How to compute the sum of two vectors or the product of a scalar and a vector.
vector components horizontal component vertical component component form vector addition the zero vector scalar multiplication 
Matrix Operations
Algebra 2 Matrices
How to use simple matrix operations.
adding matrices scalar multiple matrix matrices 
Solving a Logarithmic Equation with Multiple Logs
Algebra 2 Inverse, Exponential and Logarithmic Functions
How to solve a logarithmic equation by condensing one, or both, sides.
log equation logarithmic equation logarithmic form exponential form condense 
Solving a Logarithmic Equation with Multiple Logs
Precalculus Exponential and Logarithmic Functions
How to solve a logarithmic equation by condensing one, or both, sides.
log equation logarithmic equation logarithmic form exponential form condense 
Multiplication and Division
PreAlgebra Integers
Learn how to multiply and divide positive and negative numbers.

Absolute Value Inequalities
Algebra Absolute Value
How to solve and graph absolute value inequalities with one variable.
inequality absolute value graphing inequalities with one variable 
Adding and Subtracting Polynomials
Algebra Polynomials
How to add or subtract polynomials.
simplify combine like terms 
Adding and Subtracting Radical Expressions
Algebra Radical Expressions and Equations
How to add and subtract radical expressions.
square root radical radicand like radicals 
Adding and Subtracting Rational Expression
Algebra Rational Expressions and Functions
How to add or subtract rational expressions.
common denominator excluded value 
Multiplying Radicals of the Same Root
Algebra 2 Roots and Radicals
How to multiply radicals of the same root together.
radical multiplication root multiplication 
Solving Equations  one variable term
PreAlgebra Solving Equations and Inequalities
Solving two step equations with integers

Multiplication and Division with Decimals
PreAlgebra Decimals and Percents
Multiplying and dividing decimals by ignoring and later replacing the decimal point

Finding an Inverse Algebraically
Algebra 2 Inverse, Exponential and Logarithmic Functions
How to find the inverse of a function algebraically
finding an inverse one to one switch x and y 
The Inverse Sine Function
Trigonometry Advanced Trigonometry
How to restrict the domain of sine so it will have an inverse function.
inverse functions one to one inverse sine arcsine 
The Inverse Cosine Function
Trigonometry Advanced Trigonometry
How to restrict the domain of cosine so it will have an inverse function.
inverse functions one to one inverse cosine arccosine