Practical Problem: Boat Speed and River Currents
A word problem involving rate, time, and distance is solved step-by-step using the elimination method.
Solving the Same Rate-Time-Distance Problem Using One and Two Variables
Two different ways to write an algebraic equation for the same word problem involving rate, time, and distance are compared.
Solving a Rate-Time-Distance Problem Using One Variable
How to write an equation with one variable to solve a practical problem involving rate, time, and distance using a table to help organize the information.
Interpretations: Perceiving Three-Dimensional Figures: Binocular Depth Cues
The ability to see objects in three dimensions is the result of binocular depth cues. The fact that the images that strike the retina in each eye are slightly different allows our brain to merge these different inputs into a single three-dimensional...
Adding Signed Numbers: Practical Problems: Temperature and Distance
This clip provides two short exercises, one dealing with temperature changes, the other with changes in direction, to illustrate how to solve practical problems involving the addition of signed numbers.
Number Line, The: Introduction to the Number Line
This clip explains the concept of the number line, a kind of road map on which every whole number has a corresponding point. The points are in order, just like the numbers, and the distances between them are equal.