3 Variables

How To : Solve 3 equations with 3 variables

You can solve 3 equations having 3 variables. Here are the 3 equation examples: x+2y+z=10. 2x-y+3z=-5. 2x-3y-5z=27. The goal is to reduce to 2 equations having 2 variables. Multiply bottom equation by (-1). Rewrite 2nd and 3rd equation. 2x-y+3z=-5. Add -2x+3y+5z+-27. Equals 2y ...more

How To : Set environment variables in Windows XP

This video shows you how to set environment variables in Windows XP. A lot of the older software written for windows requires the use of environment variables. There are variables set at the system level and programs that run in a DOS window or older programs can access these ...more

How To : Program variables in the Lego Mindstorms NXT system

Using variables allows your Lego Mindstorms NXT robot to store numbers or text based on input. Learn how to program variables using the NXT programming environment. Program variables in the Lego Mindstorms NXT system. Click through to watch this video on ortop.org

C/C++ for Hackers : Part 7 (Variables)

Welcome back, fellow hackers! in this part, we will be looking at what variables are, what types of variables exist, and how to create and use them. What Are Variables? variables are the building blocks of every software. a variable is basically a word that contains a value. ...more

How To : Set attributes and local variables in Houdini 10

This clip offers an introduction to using attributes and local variables in Houdini. It covers vertices (vertexes), points, primitives and details. Whether you're new to Side Effects Software's popular 3D production program or a seasoned graphic artist just interested in bette ...more

How To : Simplify a radical expression including variables

Want to simplify a radical expression with algebraic variables? See how it's done with this free video algebra lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks t ...more

How to Program in C# : Variables and Data Types (Part 2)

Welcome back my friends !! Today we'll go through the second part of this C# series Let's start!! Last time we left off with Console.WriteLine and Console.ReadKey now we'll combine these with some variables and comments. Comments are useful for multiple reasons: for exemple ...more

How To : Use variables when writing a program in Java

Java works a little differently than languages like Python or PHP when it comes to working with variables. This tutorial shows you what the difference is, how you can define your variables and the easiest ways to work with them when writing programs in Java.

How To : Encrypt batch files with variables

Encryption is the process of converting you data in to other obscure form so that no one can read it. Encryption can also be done using batch files. Batch files are scripting programs in windows which can be used to program small automatic operations. To do this open a notepad ...more

How To : Multiply variables

An educational video from Math Problem Generator that shows how to multiply variables. It is a very short video - about 1 min in length. This video is really for kids who have just started their algebraic variable classes. This video takes two variables of x along with their ...more

How To : Add and subtract variables

Math Problem Generator gives a video about how to add and subtract variables. All you have to do is combine the coefficient, which is the number that comes before the variable. The numbers are added or subtracted but the variable remains the same. In the video, the example giv ...more

How To : Program variables in Python

Bucky from The New Boston serves up this Python video tutorial on how to program variables in Python. This is the program you use to write all of your Python code down. Fun with variables! Python is a dynamic, object-oriented, high-level, programming language that can be used ...more

How To : Work with continuous random variables in calculus

Looking for a primer on how to work with BRIEF probability density functions and continuous random variables in calculus? Learn how with this free video calc lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical mi ...more

How To : Solve an algebraic expression with given variables

Need help figuring out how to solve an equation with given variables in algebra? Learn how with this free video math lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, th ...more

How To : Simplify fractions with variables in basic algebra

Need help reducing fractions containing algebraic variables? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it' ...more

How To : Create a scatter diagram for 2 variables in Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more

How To : Perl for the Aspiring Hacker - Part 1 - Variables

Before I start a series on remote exploitation, I think we should learn the basics of Perl. Perl, Ruby, C, C++, Cython and more are languages that some penetration testers just need to learn. Perl is a great language for multiple things, sadly, like many other scripting langua ...more

How To : Simplify complex fractions with variables

In order to simplify complex variables, you must first consider the numerical values separate from the variable. In the case of 24x/48x, you would look at the numbers alone to see if they have any factors. These numbers have the number 6 in common. So, divide it by 6. This wil ...more

How To : Divide variables

This is a helpful video provided by Math Problem Generator. It deals with the complex challenges of dividing variables. The audio is great and provides specific examples of dealing with multiple types of this problem. The video lays out three simple steps. The first being to s ...more

How To : Overwrite variables on a subclass in Python

Bucky from The New Boston serves up this Python video tutorial on how to overwrite variables on a subclass in Python. This is the program you use to write all of your Python code down. Fun with subclasses! Python is a dynamic, object-oriented, high-level, programming language ...more

How To : Solve equations with variables on both sides

Confused in math class and need some extra help? This educational video gives instruction on how to solve mathematical algebraic equations. It shows you how to break an equation down and make them less scary to solve. Step-by-step instructions show you how to solve more compli ...more

How To : Evaluate fractions containing variables

This video is a great one on learning about evaluating fractions. The voice explains how to first plug in the numbers given for each variable in the fractions. He also explains the importance of simplifying the top and bottom first before simplifying the entire fraction. He al ...more

How To : Security-Oriented C Tutorial 0x12 - Scope

What's up readers? We have ever so slightly touched upon this concept of scope with variables but still don't really know what it means. In this tutorial we will learn the behaviors of variables existing in our programs and within functions. What Is a Variable Scope? A scope ...more

How to Java : E2 (DataTypes and TypeCasting)

Welcome back Java programmers! In this tutorial we'll being going over Variables/DataTypes and Type-casting So What Are Java DataTypes? Like in many other programming languages, you have variable types. Such as ints, doubles, chars, etc. They are used to instantiate the kind ...more

How To : Massage data in Houdini 10

Get a crash course on HScript Expressions, Variables, and Attributes in Houdini 10. If you don't even know what this means, then you probably need to check this video tutorial series out. Understanding how to massage data in Houdini is key to giving yourself the creative edge ...more

How To : Combine like terms

In order to combine like terms, you need to look at the variables. Terms can only be combined if the variables are all identical. The first thing that you would have to do is look for matching variables. In the example, x + 2x5 + y2 - 9x - 2x5 + 5y2, you should try to see whic ...more

How To : Communicate between Flash AS3 and PHP

All the files you need are in a free download on DevelopPHP. PHP has to be on a server. It will not run on a local machine. Type your name. There are two variables which show up in the dialog boxes (which are stacked.) You can change the user name. It sets up a URL request and ...more

How To : Simplify radical expressions

In this video the instructor shows who to simplify radicals. If you have a term inside a square root the first thing you need to do is try to factorize it. First factorize the numerical term. Write down the numerical terms as a product of any perfect squares. Now split the ori ...more

How To : Properly Submit Tools for the Null Byte Suite

Hello everyone. I've recently made the annoucement of the Null Byte suite of tools, and we've covered how to download and install it. Now it's time we cover how to submit a tool for inclusion into the suite. It's relatively simple, but we need to get a few ground rules out of ...more

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