solving a system in three variables 41 videos

Solving Multistep Equations
Algebra Solving Equations
How to solve multistep equations.
expressions equations solutions implying like terms combining like terms 
Selling Multiple Items
Algebra Word Problems Using Systems of Equations
How to set up a system of equations to represent word problems where someone is selling multiple items.
system of equations coefficient elimination 
Coin Word Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems about values and number of coins.
coins system of equations substitution 
Age Word Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems about the ages of two people.
age system of equations substitution 
Graphing 2 Variable Inequalities
Algebra Solving and Graphing Inequalities
How to graph inequalities in the xy plane.
inequality y = mx+b Cartesian Coordinate plane shading 
Solving Rational Equations with Like Denominators
Algebra Rational Expressions and Functions
How to solve rational equations by clearing the denominator.
clearing the denominator common denominator excluded value 
Solving Rational Equations with Unlike Denominators
Algebra Rational Expressions and Functions
How to solve rational equations with unlike denominators.
common denominator excluded value 
Solving Quadratic Equations Using Square Roots
Algebra Quadratic Equations and Functions
How to solve quadratic equations using square roots.
square root 
Work Word Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems when 2 people are doing a work job together.
ratio word problem system of equations work 
Rate Word Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems involving rates of travel, possibly including wind or water current.
rate ratio d=rt word problem system of equations 
Direct Variation
Algebra Linear Equations and Their Graphs
How to tell if two variables vary directly.
direct variation y intercept constant of variation 
Inverse Variation
Algebra Linear Equations and Their Graphs
How to tell if two variables vary inversely.
inverse variation constant of variation product rule for inverse variation 
Proportions
Algebra Solving Equations
How to solve proportions.
ratio proportion fraction cross multiply 
Scatterplots and Correlations
Algebra Introduction to Statistics
How to identify positive correlations, negative correlations, or no correlation between two variables.
scatterplot correlation trend line line of best fit 
Linear Inequalities
Algebra Solving and Graphing Inequalities
How to notate solving and graphing inequalities.
inequality notation 
Absolute Value Equations
Algebra Absolute Value
How to solve equations with absolute values.
absolute value solutions 
Completing the Square
Algebra Quadratic Equations and Functions
How to solve a quadratic equation by completing the square.
completing the square perfect square trinomial 
The Quadratic Formula
Algebra Quadratic Equations and Functions
How to use the quadratic formula to solve quadratic equations.
quadratic equation quadratic formula coefficient standard form 
Mixture Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems when mixing two quantities with different prices.
amount price mixture word problem 
Sum of Digits
Algebra Word Problems Using Systems of Equations
How to solve a problem when asked to switch the digits of a 2digit number.
sum digits word problem