• #### Graphing 2 Variable Inequalities - Concept

##### Math›Precalculus›Linear Equations and Inequalities
How to graph inequalities in the xy plane.
• #### Graphing 2 Variable Inequalities - Problem 3

##### Math›Precalculus›Linear Equations and Inequalities
How to graph inequalities in the xy plane when the line is vertical or horizontal.
• #### The Midpoint and Distance Formulas in 3D - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to find the equation of the set of points equidistant from two given points.
• #### Solving a Linear System in Three Variables with no or Infinite Solutions - Problem 1

##### Math›Algebra 2›Systems of Linear Equations
How to solve a system of linear equations in three variables that yields no solution.
• #### Graphing 2 Variable Inequalities - Problem 1

##### Math›Algebra›Solving and Graphing Inequalities
How to graph inequalities in the xy plane when the equation is solved for y.
• #### Graphing 2 Variable Inequalities - Problem 2

##### Math›Algebra›Solving and Graphing Inequalities
How to graph inequalities in the xy plane when the equation is not solved for y.
• #### Area With the Cross Product - Problem 2

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to compute the area of a triangle in the xy-plane using vectors formed from two of its sides.
• #### Distance Formula - Concept

##### Math›Geometry›Pythagorean Theorem
How to derive the equation for the distance between two points using the Pythagorean Theorem.
• #### Distance Formula - Concept

##### Math›Trigonometry›Pythagorean Theorem
How to derive the equation for the distance between two points using the Pythagorean Theorem.