02:22duration 2 minutes 22 seconds

Introduction to compound interest

A short discussion of how compunde interest works and why the amount in a compound interest account grows more and more quickly.

04:11duration 4 minutes 11 seconds

Graphing a parabola of the form y =- ax^2 + bs +…

Graphing a parabola of the form y =- ax^2 + bs + c: Integer coefficients

Shows how to ofirst find the coordinates of the vertex, then choose other inputs to find two more points on each side of the vertex, plott them and draw the graph.

01:38duration 1 minute 38 seconds

Solving for a variable in terms of other…

Solving for a variable in terms of other variables using addition or subtraction: Advanced

Describes how to rearrange a simple formula with several variables so that a different and particular one is isolated.

04:13duration 4 minutes 13 seconds

Signed fraction addition or subtraction: Basic

Three quick demos, two subtractions and an addition which need adjusting first to create a common denominator