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Linear equation word problems
By Khan Academy
Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790.
Linear equation word problems
By Khan Academy
Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790.
Linear equation word problems
By Khan Academy
Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790.
Systems of Equations Word Problems
By yourteachermathhelp
For a complete lesson on systems of equations word problems, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to solve number and value word problems using a system of linear equations, as demonstrated in the following problem. Rodolfo has a total of 17 dimes and quarters worth $3.05. How many of each coin does he have? The two variables used in this problem are d, number of dimes, and q, number of quarters. Since Rodolfo has a total 17 dimes and quarters, one equation is d + q = 17. Since the value of his coins is $3.05, the other equation is 10d + 25q = 305. Note that since d represents the number of dimes, 10d represents the value of the dimes. And since q represents the number of quarters, 25q represents the value of the quarters.
Graphing Quadratic Equations
By Marc Whitaker
Instructor uses a white board to model graphing quadratic equations. Examples show using quadratic equations in standard form to determine the line of symmetry, create a table of values, and graph the quadratic equation by using these values.
Understanding Geometry | MathHelp.com
By MathHelp.com
This lesson covers wind and current problems. Students learn to solve wind and current word problems using a system of linear equations, as demonstrated in the following problem. Into a headwind, the plane flew 2000 miles in 5 hours. With a tailwind, the return trip took 4 hours. Find the speed of the plane in still air and the speed of the wind. The two variables used in this problem are p, the speed of the plane in still air, and w, the speed of the wind. So the speed of the plane with a tailwind can be represented as p + w, and the speed of the plane against a headwind can be represented as p -- w. Note that this problem requires a chart to organize the information. The chart is based on the formula rate times time = distance. The chart is then used to set up the two equations.
Qtr 2, Lesson 5: Graphing Linear Equations in Slope-Intercept Form
By Stan Lisle
This lesson teaches about Slope - Intercept Form, and how to use this form to graph equations, or to determine the equation of lines. The video contains questions after each section to help guide the student through the lessons.
Finding One Variable Statistics With a Graphing Calculator
By YouTube (Firm)
This quick YouTube video from high school statistics teacher Roger W. Davis explains how to find one variable statistics using the TI-84 graphing calculator. The demonstration goes through three steps: entering the data, finding one variable statistics using the STAT menu, and interpreting the results. The data created includes mean, sum, median and more. Flash player is required to view this video, and the running time for the clip is 3:12.
Solving for 'X' ; Quadratic Equations Involving the Pythagorean Theorem - Example 3
By PatrickJMT
The Pythagorean Theorem - Just a few basic problems using the pythagorean theorem along with an application problem using the pythagorean theorem.
Quarter 2, Lesson 1: Coordinate Plane, Introduction to Graphing Linear Equations
By Stan Lisle
In this video clip, the lesson reviews the coordinate planes and prepares the viewers to start graphing equations. The video provides clear examples with questions for viewers to answer after each lesson.
Graphing solutions to two-variable linear equations
By Khan Academy
Graphing solutions to 2 variable linear equations
Graphing solutions to two-variable linear equations
By Khan Academy
Graphing solutions to 2 variable linear equations
Graphs of linear equations | Linear equations and functions | 8th grade
By Khan Academy
A video that goes over graphing linear equations on the coordinate plane. The first part of the video starts with an equation with two variables, x and y. The instructor finds sample points and then plots them. Then, he moves on to some more complicated and conceptual problems.
More examples of constructing linear equations in slope-intercept form | Algebra I | Khan Academy
By Khan Academy
Watch this video to learn how to derive and graph a linear equation from either: two points on the line the y-intercept and the slope A linear equation (in slope intercept form) is a line of the form y = mx + b where m is the slope and b is the y-intercept--the value at which the line intersects the y-axis.
More examples of constructing linear equations in slope-intercept form | Algebra I | Khan Academy
By Khan Academy
Watch this video to learn how to derive and graph a linear equation from either: two points on the line the y-intercept and the slope A linear equation (in slope intercept form) is a line of the form y = mx + b where m is the slope and b is the y-intercept--the value at which the line intersects the y-axis.
Algebra Basics: What Is Algebra? - Math Antics
By Lumos Learning
This video gives an overview of Algebra and introduces the concepts of unknown values and variables. It also explains that multiplication is implicit in Algebra.
Algebra I Help: Solving Systems of Linear Equations Part II Graphing 2/3
By yourteachermathhelp
The instructor uses a white board for demonstration and this video is suitable for high school students. Students learn to solve a system of linear equations by graphing. The first step is to graph each of the given equations then find the point of intersection of the two lines which is the solution to the system of equations. If the two lines are parallel then the solution to the system is the null set. If the two given equations represent the same line then the solution to the system is the equation of that line.