• #### Work Word Problems - Problem 2

##### Math›Algebra›Word Problems Using Systems of Equations
How to solve word problems when 2 people are doing a work job together.
• #### Age Word Problems - Problem 2

##### Math›Algebra›Word Problems Using Systems of Equations
How to solve word problems about the ages of two people if given their past ages.
• #### Percent Concentrations - Problem 4

##### Math›Algebra›Word Problems Using Systems of Equations
How to write a system and solve chemistry percent mixture problems
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• #### The Cross Product of Vectors - Problem 3

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to find the equation of a plane that contains three given points.
• #### 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 2-digit number and one digit is zero.
• #### 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.
• #### Percent Concentrations - Concept

##### Math›Algebra›Word Problems Using Systems of Equations
How to solve word problems about mixing two liquids with different percent concentrations.
• #### Work Word Problems - Problem 3

##### Math›Algebra›Word Problems Using Systems of Equations
Algorithm for solving "work" word problems including shared job and individual job completion times
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• #### Rate Word Problems - Problem 6

##### Math›Algebra›Word Problems Using Systems of Equations
Solving a rate word problem where there are two travel rates
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• #### Age Word Problems - Problem 3

##### Math›Algebra›Word Problems Using Systems of Equations
Techniques for solving word problems that involve changing relative ages
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• #### 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 2-digit number.
• #### Rate Word Problems - Problem 5

##### Math›Algebra›Word Problems Using Systems of Equations
Solving for time in a distance = rate times time word problem
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• #### 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."
• #### 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.
• #### 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 2-digit number and the result is more than the original.
• #### 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.
• #### 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.
• #### Rectangular Coordinate System - Concept

##### Math›Algebra 2›Graphs of Linear Equations
How to talk about the rectangular coordinate system.