Finding Coordinates from Points on the Plane
Finding coordinates from points on a graph.
Solving Systems of Equations Using the Elimination Method by Subtraction
Another way to eliminate terms that are additive inverses is by subtraction.
Practical Problem: Boat Speed and River Currents
A word problem involving rate, time, and distance is solved step-by-step using the elimination method.
Problem: The Perimeter of a Rectangle
Writing a system of equations to find the length and width of a rectangle, given the perimeter, and using the formula for finding the perimeter of a rectangle.
Practical Problem: The Length of the Spring on a Scale
Using the elimination method to solve a practical problem involving a scale, a spring, and some weights.
Standard Form of a Linear Equation
The standard form for a linear equation is detailed.
Practical Problem: Find Travel Speed
In a practical illustration, travel speed is calculated using two ordered pairs.
Practical Problem: Furniture Salesperson Earnings
Using the slope-intercept form to solve a practical problem involving calculating earnings.
Introduction to Linear Equations with Two Variables
Linear equations with two variables have an infinite number of solutions.
Graphing Points on the Coordinate Plane
How to graph points on the coordinate plane.