equation line   219 videos

• Cramer's Rule

PrecalculusSystems 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
• Vertical and Horizontal Shifts of Quadratic Graphs

How to graph parabolas with horizontal and vertical shifts without making a table of values.

• Coin Word Problems

AlgebraWord Problems Using Systems of Equations

How to solve word problems about values and number of coins.

coins system of equations substitution
• Age Word Problems

AlgebraWord Problems Using Systems of Equations

How to solve word problems about the ages of two people.

age system of equations substitution
• Symmetry of Polar Graphs

PrecalculusPolar Coordinates and Complex Numbers

How to determine if the graph of a polar equation is symmetric about the x-axis.

polar graph polar equation symmetry reflection x axis symmetric about the x axis
• Graphing Radical Equations using Shifts

How to graph radical functions without making a table of values.

shift dilation
• Applied Linear Equations: Mixture Problem

PrecalculusLinear 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: Investment Problem

PrecalculusLinear Equations and Inequalities

How to solve an interest problem when given the total amount deposited.

word problem investment interest
• Applied Linear Equations: Tax Problem

PrecalculusLinear Equations and Inequalities

How to solve a word problem about finding the tax on a purchase.

word problem tax
• Applied Linear Equations: Distance Problem

PrecalculusLinear Equations and Inequalities

How to find the speed of transit when the time of two different legs is known.

distance rate time word problem
• Applied Linear Equations: Collection Problem

PrecalculusLinear 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
• Applied Linear Equations: Consecutive Numbers

PrecalculusLinear Equations and Inequalities

How to solve a problem involving consecutive integers.

consecutive numbers

• Applied Linear Equations: Mixture Problem

Algebra 2Linear Equations

How to solve a mixture problem when the size difference between the two containers is known.

word problem mixture
• Applied Linear Equations: Investment Problem

Algebra 2Linear Equations

How to solve an interest problem when given the total amount deposited.

word problem investment interest
• Applied Linear Equations: Tax Problem

Algebra 2Linear Equations

How to solve a word problem about finding the tax on a purchase.

word problem tax
• Applied Linear Equations: Distance Problem

Algebra 2Linear Equations

How to find the speed of transit when the time of two different legs is known.

distance rate time word problem
• Applied Linear Equations: Collection Problem

Algebra 2Linear 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: Consecutive Numbers

Algebra 2Linear Equations

How to solve a problem involving consecutive integers.

consecutive numbers
• Find an Equation for the Sine or Cosine Wave

TrigonometryTrigonometric Functions

How to identify the graph of a stretched cosine curve.

sine cosine period amplitude intercepts turning points