In this tutorial the author explains of how to find out percentages of a given number. He explains that x percent of some number y is x multiplied by y and divided by 100. He goes on and explains this concept with numerous examples. He suggests a short cut to move the decimal point of a number two digits to the left to divide that number by 100. The author demonstrates many more similar tricks and short cuts using which one can easily solve percentage problems. So if you are looking for a goo...
An educational video from free math tutoring that shows an easy way to calculate differences of temperature. Many times people commit simple mistakes in subtracting temperatures that lead to illogical results. This video explains a very common pitfall and at the same time, clears up an important concept in temperature subtraction.
In this tutorial the author shows how to find out the missing part of a triangle that is similar to another triangle. He explains the concept of similar triangle diagrammatically by showing that similar triangles have similar angles and parallel sides. Now he labels sides of similar triangles and marks the value of unknown side as variable x. Now in similar triangles as the lengths of sides of proportionate he shows how to write a equation of proportion and solves it finding the missing part ...
Want to finally get on top of those icky fraction questions? Learn how to multiply and divide fractions the easy way. In this particular video, you will receive some very useful tips on how to solve most types of fractions. It will teach you exactly how to multiply and divide fractions by multiplying the numerators and the denominators, whether the fraction has like denominators or not. After watching this tutorial, you will be able to solve those dreaded fractions more quickly and a lot easi...
Dogmantics dog trainer Emily Larlham shows us some exercises that should be repeated once a day in the first sixteen days of your dogs life to create a super puppy!
Mods have gone from car parts to British youthful rebels to computer game addons to this. Rubik's Cube mods. Yes, they're here. This video will show you how to modify a standard 3x3 Rubik's Cube so that it will turn and solve much more quickly and smoothly. You will need a dremel, vaseline, and some other tools, but the results are impressive.
This video tutorial is for beginner puzzlers who are getting more advanced in their speedsolving of the Rubik's Cube. When solving the Rubiks Cube, there are these mathematical equations called algorithms, which I'm sure you already know. But wait... what do algorithms have to do with notation? Well, in an algorithm you have a sequence of letters that tell you which sides of the cube you want to turn. Each of the six sides of the Rubik's Cube are associated with a letter and a symbol that tel...
Copying a file's path on your Mac isn't always an easy task. Thankfully, this cool little OSX utility called Copy Path Finder helps solve this problem and lets you copy the path of a file in your file system to the clipboard so that you can paste it into a text editor later.
The Sunset House is one of the cooler environments in the massive Albion of Fable 3, but unlocking it and solving it's mysteries isn't easy. Watch this video to learn how to find the Sunset House, complete the quests therein, get the "Knight Jumps Chesty" achievement, AND unlock a legendary weapon all in one video.
If you and your friends love to solve different kinds of Rubik's cubes, and you want to play a prank on one or more of those friends, this video will show you how. It will teach you how to take apart a 4x4 Rubik's Cube with a core and put it back together without the core, so that when one of your friends tries to take it apart it will crumble in their hands.
In this video tutorial, find out how to copy and paste HTML links embedded in the text with a breeze. No longer will you have to worry about re-entering every single link one by one. This video will give you a quick and easy solution to solving your most worrisome problem. Enjoy!
Installing security lights outside of your home can make for a great addition, but they also create new problems with regards to maintenance and cleaning. Having lights outside exposes them to all of the elements that mother nature can throw at them. This video will show not only how to install security lights, it will also show the proper measures to take so they will keep working with minimal maintenance and care.
Problems playing certain formats of video and audio on you computer? It could be because of codec issues. The Lab Rats, Andy Walker and Sean Carruthers, talk about what codecs are and teach you how to troubleshoot codecs to solve your audio and video playback problems. This is a great video to explore that could help you with many WonderHowTo problems!
This is a video tutorial in the Education category where you are going to learn how to write equations in pre-Algebra. Write an equation that represents the following sentence and then solve the equation. The product of n and 6 is 12. That's n multiplied by 6 or 6n = 12. We want to solve our equation for n. That is we want to get n all by itself on the left hand side. Since n is multiplied by 6, we got to divide both sides by 6. So, we get 6n/6 = 12/6. On the left hand side of the equation, 6...
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 tutorial, we learn how to simplify algebraic fractions. First you will need to simplify the fractions. You need to factor the numerator out, figure out what A is and what B is. Then, figure out what C is and what the products equal as well. When you have these, you will be able to fill these factorizations into the equation. Rewrite the equation with your figured out numbers inside, then you will be able to solve the equation. Use the rules of PEMDAS to figure out how to solve it, the...
In order to convert Celsius to Fahrenheit, you will need to use this formula: F = 9/5C + 32. Therefore, you will need to solve for C or substitute values and solve in that manner.
If you own a top load washer that refuses to drain or spin, you already know you have a problem. Those are two areas that need to be taken care of quickly so that you or your clothes don't suffer.
See how to solve quadratic equations in algebra through factoring with this free video math lesson. Factoring quadratic expressions is easy once you know the system. Learn it with this how-to. 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 finish your homework or study for that next big test).
A system of linear equations usually has a solution that is an ordered pair (x,y). Sometimes that isn't the case, especially when the equations represent the graphs of parallel lines (inconsistent system) or the same line (dependent system). Learn how to solve a system of equations algebraically in 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,...
As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 32nd installment in his "Excel Business Math" series of free video lessons, you'll learn how to solve simple markup (mark-up) & markdown (mark-down) business math problems.
PatrickJMT takes you through step by step on the basics of how to use curve sketching to solve calculus equations. Steps that are covered in this two part video include domain, intercepts, symmetry, horizontal and vertical asymtotes, intervals of increase/decrease, local maximums and minimums, concavity and points of inflection, and finally the sketch. A rational function is looked at as an example. The problem is to graph y equals (x - 1) divided by x to the power of 2. This video clip cover...
Solving the Inequalities using graph, first you have to take the inequality equation into equal. Then convert the equation into straight line equation i-e(y=mx+c). Giving own values for 'x' like (-1, 0, 1) we would get the value for 'y'. By plotting these points in the graph, you will get an straight line. If the given equation is greater than symbol, shade towards the positive part. If the given equation is smaller than symbol, shade towards the negative part. This is an one method to solvin...
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+8z=-32. Go back to original equations and multiply by (-2). Then you have -2x -4-2z=-20. plus 2x -y +3z. When you add these 2 equations, the answer is -5y +z = -25. You have now reduced the equations from 3 equations do...
This video is about fixing self-closing doors. Doors close by themselves when they're not hung plumb, and gravity closes the door. The solution is to remove the hinge-pins and to roughen the bottom of the hinge-pins to create friction, keeping the door open. One removes the hinge-pin with a hammer and small screwdriver. Tap the bottom of the hinge-pin against a cinder block or rough, hard surface. If using this "friction-ized" hinge-pin does not solve your problem, try repeating this process ...
This video deals with solving quadratic functions. It does not involve the use of the quadratic equation; rather, only factored equations are used. The speaker starts out with a factored quadratic equation. The speaker goes on to do the mathematical steps necessary to find both the x and y intercepts of the quadratic function at hand. The author then continues on with the example to find the function's minimum. Next all of the points that have been solved for are plotted and the function is s...
This tutorial teaches you how to find a mathematical equation of a line given 2 points that exists on the line. The tutorial starts off with 2 points labeled (2,-4) and (3,6). The first step is to determine the slope of the line using the formula given in the tutorial in blue. The slope is then solved as 'm'. Plug the slope and the points into another formula given in green. The tutorial maker provides a tip that one can use x1 and y1 or x2 and y2, however, it must be consistent. After, solve...
This video shows the method to graph a linear function by finding the X and Y intercept. Only two points are needed to graph linear functions. So we find the point on Y axis or the Y intercept and the point on the X axis or the X intercept. We notice that on the Y axis the X coordinate is zero. So, we find the Y intercept by putting x=0 in the given equation and solving for y. In the same way, we find the X intercept by putting y=0 in the given equation and solve for x. We join the two points...
In this video the instructor teaches about inverse functions. Normally in inverse functions problems you are given a function that has a set of points and you are asked to find the inverse of that function. So if the function has a point in the form (x, y) then the inverse function has its points in the form of (y, x). Now when you are given a function f(x) that is in the form of x and asked to find its inverse, equate the function to y. Solve the equation to get the value of variable x in th...
In this video the instructor shows how to factor the difference of squares using a formula. The formula to find the difference of squares can only be applied if you have two perfect squares. The formula is (a * a - b * b) = (a - b) * (a + b). That is the difference of squares of two numbers is the product of sum of two numbers and difference of two numbers. So when you need to find the difference of squares of two numbers substitute the values in the above formula to directly solve for the fa...
This video shows the method to simplify expressions with different exponents. The video starts with the explanation of 16 raised to the power 1/4. This can be solved by taking the nth or the 4th root of 16 where n stands for the denominator of the fraction. Then the video explains 8 raised to power 4/3. This can be solved in two ways. First one involves taking the cube root of 8 and raising it to the power of 4. The second method involves converting 8 into 2 raised to the power 3 and taking t...
In this how-to video the person gives a detailed evaluation of the functions of the ti-89 calculator. The video is a short but informative look at the Ti-89 calculator. During the video the person shows a difficult math problem and shows how to use the Ti-89 calculator to solve that problem. The video uses some of the functions on the calculator and shows a display of where the buttons are located on the calculator. It also shows how to properly use the calculator to solve the problem while w...
In this video the instructor shows how to do temperature conversions using y = m*x + b. Now if Celsius is represented by the variable C and Fahrenheit is represented by the symbol F, you can replace then in the previous equation in place of the variables x and y giving you the equation C = m*F + b. Now to solve for the values of the constants m and b you need to have values of two sample temperatures in both Celsius and Fahrenheit. Take the first sample and substitute in the above equation gi...
In this video, the instructor demonstrates how to solve radical equations and inequalities. If you have an equation that contains radicals, re-,arrange the equation so that all the radicals are on one side and the integers are on the other side. To cancel a square root from an equation, square both sides of the equation. The square of the equation cancels out the square root, thereby removing the radical. Even after squaring if you still have a radical left, treat it as a new problem and appl...
In this video the instructor shows how to convert temperature using the point slope form. In this kind of problem sometimes you are given a temperature in Fahrenheit and its equivalent in Celsius and an other temperature similarly in both Fahrenheit and Celsius. Now you are asked to find a linear equation for these pair of temperatures. To solve these kind of problems assume that the given temperatures represent the point (x, y). Now you have two points. Substitute this value in the point slo...
In this video the instructor shows how to add and subtract rational expressions. When you have an addition or subtraction problem of rational expressions, first look and compare the denominator of all the terms. If all of them have the same denominator then the expression can be written as a fraction whose denominator is the original common denominator and whose numerator is the sum of numerators of all the other terms. Simplifying the numerator by adding and subtracting the like terms gives ...
In this tutorial the instructor shows how to find the vertices of a polygon of constraints. In any optimization problem after defining your polygon you need to find its vertices. First you will have a set of equations which represents the constraints in your problem. Now you have to find the coordinates of the vertex of it by solving the optimization problem. To do that you have to start with a point and check the lines that are passing through it. Now take those lines and solve them for the ...
This video is describing how to solve quadratic equation by quadratic formula. The quadratic equation is given in the video and we will use quadratic formula. We will put the equation in the formula our equation is 4psquare= -23p - 15. Now add 23 to both sides and then add 15 to both sides now we will get an easy equation, 4 will be used as a and 23 will be used as b and 15 will be used as c and we have a=4,b=23 and c=15 put these values in the quadratic formula and we have the value of p=5.-...
This video teaches you how to test for symmetry algebraically. You will need to know the basic formats of graphs and the (x,y) setup. Once you get your equation of the line, you will need to replace y with negative y and x with negative x and solve the equation. You will need to solve for x and also for y for the odd and even. If the equations do not equal each other then they are not even or they are not odd. If this is the case then the lines are not symmetrical and that is how you test for...
This video is about solving long division. Divide from the left most number. 95 can not go into 13 so 0 goes on top of 13. 95 goes into 132, 1 time. A "1" goes on top of the 132 and divide. Apply remainder with next number. Bring down next number to get 370. Apply remainder with next number. Repeat division to last number. Remember to include any remainder if the number does not divide evenly. Repeat steps 1 and 2. Since there are no more numbers to bring down, the remainder is "1". This vide...
