In this video the instructor shows how to solve a 3 x 3 linear system using the Cramer's rule. In this kind of problem you are given three equations in three variables x, y, z and you need to solve for the values of these equations. You can solve this using the Cramer rule which says that the value of x is Dx/D, where Dx and D are two different determinate. Now you have to figure out the determinate to get the value of variable x. The determinate D is called the foundation determinate and is ...
JustMathTutoring This video shows the procedure of finding derivatives using the Chain Rule. The Chain Rule states that the derivative of a composition of functions is the derivative of the outside function evaluated at the inside multiplied by the derivative of the inside. This can be stated as if h(x) = f[g(x)] then h'(x)=f'[g(x)]g'(x). This is explained by two examples. In the first example we find the derivative of the sine of square of 'x'. We take the derivative of sine at square of 'x'...
Multiplying positive and negative numbers may seem confusing. However, in this math tutorial, multiplying numbers with different or same signs is made easy and eliminates all confusion. The narrator of the video explains the key rules to remember when dealing with the possible combination of positive and negative numbers. The video breaks it down to two key rules. When you have a negative and a positive number; the result will always be negative. When you are given two numbers that have the s...
See how to apply exponent rules to simplify radicals or square roots with this free video math lesson from Internet pedagogical superstar Simon Khan. Looking for a primer on how to solve matrix problems using a TI-89 graphing calculator? 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 to the Internet, it's easier than ever to follo...
Racquetball is a very fun way to keep active, and is not very difficult to play. In this tutorial, the Texas Tech Racquetball Club will take you from beginner to professional in just a few minutes.
Ever watch a cheesy movie and say "That monster is so FAKE!" but not really understand why? Well monstrous monsters are governed by a little biological rule called the Square-Cube Law, a scientific term combining math, anatomy and physics into one educational tool to recognize theatrical baloney when you see it. Just watch this video to see the explanation of the Cube-Square Rule, how it works and its ramifications for our favorite B-Movie pet monsters.
This lesson in boffer sword fighting with the Knights of Gray is the most important of them all! This video tutorial for all you LARPers out there focuses on the rules and the code of foam boffer weapon fighting.
Welcome back, my tenderfoot hackers! As you should know from before, Snort is the most widely deployed intrusion detection system (IDS) in the world, and every hacker and IT security professional should be familiar with it. Hackers need to understand it for evasion, and IT security professionals to prevent intrusions. So a basic understanding of this ubiquitous IDS is crucial.
Welcome back, my novice hackers! This next subject might seem a bit obscure, but I promise you, this lesson will benefit you significantly either as a hacker or system admin. This tutorial will cover what is usually referred to as a regular expression, or regex for short.
It's some sort of unspoken rule that a girl can't wear pigtails over the age of seven. But with Pippi Longstocking as our muse, we beg to disagree! While pigtails may not be the most office appropriate hairstyle out there, they work well for humid and hot summer days to keep hair out of your face and off your neck.
English can be difficult because few words are spelled phonetically, and every rule has exceptions. But you can become a champ in no time by memorizing a few basic rules.
UPDATE (February 26, 2014) Yesterday, the U.S. House of Representatives passed H.R. 1123 with a 295-114 vote decision. The ruling repeals the 2012 Library of Congress (LOC) decision that limited the ability to legally "unlock" your smartphone (see below).
This video shows how to create a menu with rollover images in Dreamweaver. Open a new document and create a table with one row and one column. To add your rollover images, go to the "Image" tab and select “Rollover Image”. In the “Insert Rollover Image” box, give the image a name, then click “Browse” under “Original Image” to find your images. You can select your rollover images in the same window. Then enter your alternate text and click OK.
It seems like its hard to get as much sleep as we need, doesn't it? Sleep is important and effects how you function throughout the entire day. Follow these tips and you will be on your way to a good night's rest.
It's a well-known, time-honored interior design rule that putting things under glass makes them look more precious and special. Just like adding a spotlight to feature the soloist in a choir, placing a glass cloche or dome on top of a group of ornaments or a floral arrangement instantly adds fashionable curiosity.
Blackjack or 21 is one of the most popular card games played in the casino. The rules of Blackjack are very easy to learn. This tutorial teaches you the rules and strategies for the game Blackjack. With the tips from this how to video you will soon master the game of Blackjack or 21.
A very important thing to keep in mind when you're creating images from scratch or even putting things into existing images is the concept of perspective. Bert goes back to basics to teach this concept, starting with a horizon line and adherence to the rules of mother nature.
Kuler is a beta Adobe application at labs.adobe.com. It allows you to choose color schemes using rules or completely at random, then export the colors as an Adobe Swatch Exchange file for use in all of the Creative Suite applications. In this video tutorial you will learn how to create color schemes using Kuler.
Origami purists will argue that all origami creations, no matter how complex, should be folded from one single sheet of paper, but the rules were made to be broken, right? If you've already mastered the art of one-sheet origami projects like frogs and cranes, challenge yourself to this project: a tetrahedra composed of five intersecting pyramidal shapes.
Welcome back, my fledgling hackers! Nearly every commercial enterprise worth hacking has an intrusion detection system (IDS). These network intrusion detection systems are designed to detect any malicious activity on the network. That means you!
Do you like chess? How about Japanese chess? Aren't there different chess variants in Japan though? Maybe, but this specific chess variant is called Shogi. The chess-like game Shogi is won by capturing the king, just like chess, but defeat is conceded at mate, or when mate becomes unavoidable.
A judge just handed down a ruling that will make the U.S. government's quest to unlock the work iPhone of one of the San Bernardino shooters much more difficult.
Learn the basics of shooting videos in this video. This funny and informative video from Vimeo's excellent Video 101 series of tutorials demonstrates the importance of things like always carrying extra batteries, holding on to the subject for at least 5 seconds, using the rule of thirds to compose the shots, and planning the shots ahead of time.
If you're bored of plain old Magic: The Gathering and want to play a new, easy-to-learn, and awesome variation of the game? This video will teach you how to build a deck for playing Elder Dragon Highlander (EDH), a 100-card version of Magic where no card can be repeated except lands and some other rules have been awesomely changed. Check out this video for a guide to actually playing the game.
Your mom probably told you not to play with matches, but now that you're a little older it's time to start breaking that rule. Watch this video to learn how to play a fun trick on / mind game with people at a bar or other social occasion using matches.
We're experiencing a Lipstick Renaissance. Rich, defined lips ruled the fall runways, cementing the return to old school glamour and the ladylike lipstick that comes with it. Here, Sephora Pro Beauty Team member Vanessa Dunn helps you sort through the new crop of creamies. Learn a trick for finding your undertone, instantly!
Board game enthusiast Scott Nicholson reviews a new game each week showing you the pieces and rules of play, as well and demonstrating the game with friends. This weeks game, Pizza Box football, is about strategy, predictions, and of course, football.
Board game enthusiast Scott Nicholson reviews a new game each week showing you the pieces and rules of play, as well and demonstrating the game with friends. This weeks game, Indonesia, is about producing and shipping goods, dealing with mergers and acquisitions, and will take 3-5 hours to play.
As a general rule of thumb, when you wear makeup it's not supposed to look like you're really wearing makeup, but simply like you're a more awake and youthful version of yourself. Makeup is there to flatter, not to hide.
In order to stump drunk people with a cork trick, you will need the following: 2 corks per person. Tuck the cork between the thumbs and forefingers. The rules are that you have to switch out the corks without using any other fingers, besides the thumbs and forefingers, and the exchange must be simultaneous.
In algebra, you can solve a quadratic equation by applying the square root rule. With a squared term and a constant, the special quadratic equation is easily solved. Could you use a little help figuring out how to divide fractions? Watch 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's easier than ever to follow in their footsteps (or just f...
In this how to video, you will learn how to create a diagonal sum in Microsoft Excel 2007. First, open the program and make a large selection. Type in =int(rand()*500) and then press control enter. This will create random numbers for the cells in the selection. From here, click conditional formatting and select new rule. From here, type in =column(A1)-row(A1)=$H$1. For the format, choose a contrasting look, such as a purple background and bold numbers. Click okay. If you type -1 or -2 in this...
Get started on the dance floor creating belly dancing routines with the help of layering. When layering various techniques and moves in belly dancing, perfect each individual movement before combining them together. Get closer to master a belly dancing routine by layering movements with this instructional video conducted by an expert: Yasmeen began dancing at the young age of 3 and studied ballet, flamenco, folkloric, hip-hop and modern dance styles, as well as tribal fusion belly dance and O...
This video explains how to apply the 7th Law of Exponents. The principal rule explained here is that "To raise a quotient to a power, You can multiply each of its terms by the same power". This is a simple rule explained clearly with the help of a couple of examples, which is so simple that once you watch this video you will never make any mistake as far as the 7th Law of Exponents is concerned. It has also got a couple of more parts, do visit them and learn more.
It's OK to break the rules of songwriting, but know the structure of a song first so that you can break the rules intelligently. Learn how to write a song in this free music video. Structure is important in every aspect in life, so why not your song?
A basic overview of the rules of rugby. This is a two part lesson on the rules, positions, drills and game play of the sport of rugby.
No, the Kamehameha is not the famous Hawaiian king who united all the islands under his rule from 1795 to 1819. Nope. However, it is named after him. But in this case, Kamehameha is an energy blast attack shown in the Dragon Ball Z series. And with this After Effects tutorial, you're going to learn how to recreate this energy attack.
Welcome back, my hacker novitiates! A short while ago, I introduced you to regular expressions. Regular expressions are a language that is particularly useful for finding complex text patterns in streams of data.
Radical expressions are those in which the radical symbol (under root sign denoting the square root or the nth root) is present (either multiplied or added). Solving these is a bit tricky, but involves similar algebraic maneuvers in a different way.
In this video, we learn how to understand negative exponents. The one rule you have to remember is when you have a number with a negative power, then you need to divide it over one. You can take this term and put it in the denominator of your fraction to make it a positive exponent. For example, if you have 5 to the -1, then you can move the 5 to the denominator and get 1/5, which is the same exact thing! This is one of the most basic rules in math. Once you understand this, simplifying fract...
