• #### Solving for a Parameter in a Linear Equation - Problem 3

##### Math›Precalculus›Linear Equations and Inequalities
Literal equations, or solving for a variable in a given equation with multiple variables.
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• #### Solving Linear Equations - Problem 4

##### Math›Precalculus›Linear Equations and Inequalities
Shortcut for solving linear equations that involve multiple fractions.
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• #### Solving Linear Equations - Problem 4

##### Math›Algebra 2›Linear Equations
Shortcut for solving linear equations that involve multiple fractions.
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• #### Complex Fractions and Order of Operations - Problem 2

##### Math›Pre-Algebra›Fractions and MIxed Numbers
Evaluating a complicated expression with multiple parentheses and groupings
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• #### Derivatives of Polynomial Functions - Problem 3

##### Math›Calculus›The Derivative
How to find points on the graph of a polynomial function with a given slope.
• #### The Angle Between Vectors - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to determine whether two vectors are perpendicular or parallel.
• #### Solving for a Parameter in a Linear Equation - Problem 2

##### Math›Algebra 2›Linear Equations
How to solve for a parameter when there are multiple variables.

• #### Probability of Independent Events - Problem 3

##### Math›Precalculus›Topics in Discrete Math
How to find the probability of a name being drawn out of a hat given two random drawings.
• #### The Angle Between Planes - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to determine if two planes are parallel or perpendicular.
• #### Simplifying Determinants - Concept

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to simplify determinants using three row (or column) operations.
• #### Solving for a Parameter in a Linear Equation - Problem 2

##### Math›Precalculus›Linear Equations and Inequalities
How to solve for a parameter when there are multiple variables.
• #### Derivatives of Logarithmic Functions - Problem 1

##### Math›Calculus›The Derivative
How to use properties of the derivative to find the derivative of a function that contains a natural log term.
• #### Derivatives of Exponential Functions - Problem 3

##### Math›Calculus›The Derivative
How to use properties of the derivative (and properties of exponents) to differentiate functions that are partly exponential.
• #### Derivatives of Exponential Functions - Problem 1

##### Math›Calculus›The Derivative
How to use properties of the derivative to differentiate functions that are partly exponential.
• #### Perpendicular, Parallel and Skew Lines in Space - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to determine whether two lines in space are parallel or perpendicular.
• #### Vector Operations in 3D - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to find the angle between two vectors in three dimensions.
• #### The Angle Between Planes - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to find the angle between planes, and how to determine if two planes are parallel or perpendicular.
• #### History as Mystery

##### Test Prep›AP US History›AP US History Videos
Outsmart the AP U.S. History test and pick up guaranteed strategies for test success.