solving exponential equations 226 videos

The Circle
Precalculus Equations of Lines, Parabolas and Circles
How to use the distance formula to derive the equation for a circle.
circle center radius distance formula equation for a circle 
Solving and Graphing Inequalities using Addition or Subtraction
Algebra Solving and Graphing Inequalities
How to solve and graph one variable inequalities using addition or subtraction.
inequality notation 
Cramer's Rule
Precalculus Systems of Linear Equations and Matrices
How to solve a system of two linear equations with two unknowns using Cramer's rule.
systems of linear equations Cramer's rule determinant coefficient matrix 
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 
Completing the Square
Algebra Quadratic Equations and Functions
How to solve a quadratic equation by completing the square.
completing the square perfect square trinomial 
Formulas
PreAlgebra Solving Equations and Inequalities
The importance of solving literal equations for a given variable

Augmented Matrices
Algebra 2 Matrices
How to use matrices to solve a system of linear equations.
augmented matrix row operations scalar multiple 
Applied Linear Equations: Mixture Problem
Algebra 2 Linear Equations
How to solve a mixture problem when the size difference between the two containers is known.
word problem mixture 
Applied Linear Equations: Collection Problem
Algebra 2 Linear Equations
How to solve a word problem about how many dimes and quarters it takes to make a certain denomination.
collection change coins dimes quarter word problem denomination 
Applied Linear Equations: Mixture Problem
Precalculus Linear Equations and Inequalities
How to solve a mixture problem when the size difference between the two containers is known.
word problem mixture 
Applied Linear Equations: Collection Problem
Precalculus Linear Equations and Inequalities
How to solve a word problem about how many dimes and quarters it takes to make a certain denomination.
collection change coins dimes quarter word problem denomination 
Lines in 3D
Precalculus Vectors and Parametric Equations
How to find the vector and parametric equations of a line when given two points on the line.
the vector equation of a line position vectors direction vector parametric equations 
Motion Along a Line
Precalculus Vectors and Parametric Equations
How to write equations describing motion in a straight line given the velocity and the position when t=0.
velocity constant velocity position vector equation of a line parametric equations parametric equations of a line 
Basic Polynomial Graphs
Algebra 2 Polynomials
How to graph a first degree polynomial
linear equation 
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 
Vectors and Planes
Precalculus Vectors and Parametric Equations
How to find a vector normal (perpendicular) to a plane given an equation for the plane.
normal vector position vector perpendicular vectors planes the equation of a plane 
Converting from Polar Coordinates to Rectangular
Precalculus Polar Coordinates and Complex Numbers
How to convert a polar equation into rectangular form.
polar coordinates rectangular coordinates polar equations lines circles Pythagorean theorem sine cosine tangent