In this video the instructor shows how to solve mixture problems using two variables. Usually in these kind of questions the problem statement goes like, if A costs $x for a pound and B costs $y for a pound, in what ratio should they be mixed such that one pound of the new mixture sells for $z a pound. So, in these kind of problems start with a box where you list down all the given data in the form of a table as shown in the video. Now denote the unknown quantity of A and B by two variables a...
In this video the instructor shows how to solve a quadratic equation. If you have a quadratic equation with complex fractional terms and you find that a particular term is repeating then equate that term to a new variable and replace the variable in the given equation. Now try to get the equation a*x*x + b*x + c = 0, and solve for the roots of the equation which gives the values of the intermediate variable. But this variable was replaced instead of another term. So equate that term to the va...
In this tutorial the author shows how to find out the missing side of a triangle which is similar to an other triangle. He explains the concept of similar triangle using diagrams and by showing that similar triangles have equal corresponding angles and parallel sides. Now he labels sides of similar triangles and intends to find out the length of unknown side. Now in similar triangles, as the lengths of sides are proportionate he shows how to write a equation of proportion and solve it finding...
Consider two pairs of parallel lines, one pair horizontally and another is inclined from vertical position. If one of the four angles is given, then the other three angles can be easily identified. First select the angle which is down to the known angle, it will be same as first one. Then according to the law, that a straight lines consists of 180 degrees. For example if the known angle is 114 degrees, the unknown angle will be 180-114= 56 degrees.
The video is a tutorial in trigonometry. The teacher teaches that the tangent or the tan of an angle is the ratio of the opposite side to the adjacent side of a right angled triangle. If one side and one angle is given then the value of the unknown side can be found by solving the equation tan of angle is equal to opposite upon adjacent side. If the angle is to be found then the tan inverse of the value is seen in the calculator.
In this video the tutor shows how to solve the missing ratios or proportions. He explains it with an example, where a number in one of the ratios is missing and he intends to find this value. He shows the example of cross multiplication, where you multiply the values on the either side of the equation diagonally and finally solves the equation which results in the value of the unknown value. This is an introductory video explaining how to use rations and proportions to find missing values.
In this video tutorial the author shows how to use the Cosine Law. He shows how to find an angle of a triangle where he know all the sides of a triangle, using the cosine Law. He uses a lower case letter to designate a side and a capital letter to designate an angel apposite to that side. He gives the formula for the cosine law using a triangle as an example. Now he goes on and demonstrates how to use a scientific calculate. He shows how to use the degree mode in the calculator to solve these...
This how to video describes how to download and install a free beta version of Microsoft Office. This video directs you to a Microsoft site that allows you to download the beta version of Office. The author warns you that this is the beta version of Office and that the software is still in the testing phase and is prone to many bugs and unknown problems and issues. This video is perfect for the penny pincher or those who want to be on the bleeding edge of technology.
There are probably wild plants growing in your own backyard—or at least in a nearby public park—just waiting to become a free, tasty meal. Watch this video to make sure they’re actually edible. Survive in the wild with these plant identification tips.
Check out this instructional science video that demonstrates how to perform the "Lost Labels" experiment. From the Oregon Museum of Science and Industry's teacher curriculum, "No Hassle Messy Science with a Wow", this is an activity about identifying mystery chemicals. You have an array of unknown powders in miscellaneous jars, and the idea is to try to have your students figure out what are all these mysterious white powders. Learn how to perform the Lost Labels science experiment by followi...
In this tutorial, we learn how to root your G1 or MyTouch 3G with one click. First, go to theunlockr and download the MyTough 3G Root video. Now, go on your phone and click on the settings. Go to applications, then check "unknown sources", then go back and click on "sd card" and un-mount it, then format it. Once the numbers pop up again, it means your card is mounted and formatted. Now, plug your phone in with the USB cable to your computer and mount it. Now, go to the site and download the t...
This video shows the method to change a word problem into algebra and to identify rational numbers among a group of numbers. In the first part of the video we take a word problem namely - The product of 9 and seven, less than a number. 9 multiplied by something can be expressed as 9(). The unknown number can be expressed as 'x'. Seven less than a number can be expressed as x - 7, so that the final equation becomes 9(x - 7). In the second part we are given a list of numbers. A rational number ...
The first question asks for the intercepts x and y. To find X, you would need to set Y to zero, leaving the equation 3X=6. X then equals 2 after you divide both sides by 3. The X intercept that you found is not just the value of 2, but it is the ordered pair X=2 and Y=0 on a graph. To find Y, you would do the same thing, except this time X would be set to 0. In the second example of this video tutorial, you will actually learn how to graph the X and Y intercepts. To do that, you follow the st...
Don't put up with another winter of discontent. There are simple things you can do to lift yourself out of the doldrums.
Learn how to play "After Tonight" by Justin Nozuka, an acoustic guitar tutorial. Follow along with this demonstration, tabs and lyrics here:
Sorry, Galaxys S11–19, Samsung's jumping straight to Galaxy S20 this year. They're also going with essentially three base models before accounting for niche variants. Of these three models, it's clear which one's the best: the Galaxy S20 Ultra.
The hugely successful S10 series of flagships may be a tough act to follow, but Samsung has proven that it's up to the task with the Galaxy Note 10. The latest phablet bearing the Note name is the first of its line to come with an even larger variant, and boasts an eye-pleasing design with impressive performance to boot.
The OnePlus 7 Pro is definitely a beast on paper. With a specs page that ticks virtually every box and a price point that undercuts the competition by hundreds of dollars, it's hard to overlook this phone. But before you get too excited, know that OnePlus has repeatedly shown to be misleading with their official specs.
It's always a big deal when the company that makes Android releases a new phone. Google's Pixel series has made a name for itself in three short years behind its camera prowess, but now it's time to start competing with the major players. That said, Google should like how their Pixel 4 and 4 XL stack up against the iPhones and Galaxies of the world.
OnePlus, whose phones always challenge for the title of best spec-to-price ratio, releases two main devices every year. There's the primary flagship in late spring, then an iterative update with the "T" suffix in fall. Typically, there's not much difference between the two, but this year, OnePlus is mixing up the formula a bit.
In the battle for best stock Android flagships, there are really only two choices: Google Pixel phones and OnePlus phones. Although the latter isn't true stock Android, it is impressively close and usually paired with more impressive hardware than the Pixel lineup. The latest is the OnePlus 6T, which will be a bit controversial for fans this year.
The OnePlus 6 is finally in customers' hands along with its top-of-the-line specs — and yes, a notch. But you can start getting some of their stock apps as early as today, thanks to XDA user erayrafet, who ported this Weather app directly from the source.
Despite making great phones for years, Sony continues to struggle to penetrate the US market. Sales volume has fallen year after year, with 2019 limited to only 5 million units sold globally. To help alleviate this drop, last year, Sony released the Xperia 5, the return to compact smartphones. This year, rumors indicate a sequel is first on their agenda.
So the new iPhones have arrived. Like last year, Apple released three iPhones in three different sizes that vary in price and specs. There's the base model iPhone 11, and then there are the real deal, premium models, the iPhone 11 Pro and Pro Max.
For the unaware, RED is a company that specializes in high-end cameras and other recording devices. RED's cameras are used to shoot some of Hollywood's biggest films and TV shows. Their modular designs make them ideal for the user who does a lot of mixing and matching — and has a wallet to back their work up (their WEAPON 8K VV starts at $79,500).
The iPhone doesn't stop at last year's excellent iPhone 12 lineup. Apple's been developing its iPhone 13 models for a while now, and there are a lot of rumors already with eight or nine months still to go until a release. This year, we're expecting four new models with similar sizes and features to 2020's offerings. If you want to know what makes the 2021 iPhones so different, we've got answers.
Soon, you'll be able to buy your OnePlus 6, but you can experience some of its apps today thanks to XDA user erayrafet, who ripped a few OxygenOS apps like Weather and this Gallery app. While Google Photos is a great service, this Gallery app should be your go-to app for locally-stored photos.
Because of the way Google Play works, Android has a "bad app" problem. Google allows any developer to upload an app to the Play Store, regardless of if it works, how it looks, or whether or not it can harm users. Malware scanning happens primarily after apps are uploaded, and though Google has recently taken steps to safeguard users with its Play Protect program, you don't have to depend on them.
Last year, many were caught off guard when Google released a midrange Pixel device. It was quickly crowned the best value-buy phone on the market, as it brought most of the camera tech people loved in the flagship Pixel for almost half the cost. Google's 2020 entry in this series has finally made its long-awaited debut.
The original iPhone SE was, for some, the perfect iPhone. It brought back the popular one-handed form factor of the iPhone 5 but packed in the internals of the then-new iPhone 6S. Now, the second-generation iPhone SE is here for 2020, but can it live up to what made the first-generation iPhone SE so popular?
Thanks to HTML5 and dedicated video apps, watching your favorite shows, movies, or video clips on your Samsung Galaxy S4 couldn't be easier. However, there are still times when you'll run into a website that requires Flash to play a video or interact with its content. Although its mobile life has been dead on Android for 2 years, Adobe Flash Player still lives on in the desktop world, fueling millions of websites such as YouTube, Vimeo, ESPN, CNN, and more.
Rumors about the 2022 iPhone series stirred well before the iPhone 13 models were even released. While Apple remains quiet on the next big iPhone, as it always does, we're seeing more and more leaks and reveals for the iPhone 14 series as we lead up to a likely fall release.
For a while, YouTube Red original content was a joke, lagging behind other services like Netflix and Hulu in terms of quality, so breaking down the paywall didn't seem necessary. However, with series like Cobra Kai turning heads, it's a good time to start using Red. Luckily, Android users can get all of this content for free, and without rooting.
When I'm not actively using my Samsung Galaxy S4, I typically crank the volume up all the way so I can hear it in my pocket or if I'm in another room. But when it's in my hands and I'm using it, I don't want the ringer to blast at full volume, or any volume at all. Either I'll see a notification come in, or a quick vibrate will call my attention to any pertinent alerts.
About a year ago, Abode decided to discontinue support for Flash on the Android platform. With its security concerns, it's understandable why some people would want to disable Flash on their devices, but there are still some things you can't do without it. Amazon Instant Videos is one thing you can't do, giving you nothing but a "Flash Player is not installed" warning.
In a bold move, Samsung has decided to forgo the Galaxy S11 moniker and jump straight to the S20. Perhaps it's marketing for the new 20:9 aspect ratio and 120 Hz display, or maybe it's just the fact that it's releasing in 2020.
If you have friends like mine, letting them check out one photo on your phone means they're going to check out all of the photos on your phone. Before you realize what they're doing, it's too late, and they're sending out perverted emails to your coworkers, making you look like a newb at Candy Crush Saga, and viewing your Snapchats for you.
Hashes are commonly used to store sensitive information like credentials to avoid storing them in plaintext. With tools like Hashcat, it's possible to crack these hashes, but only if we know the algorithm used to generate the hash. Using a tool called hash-identifier, we can easily fingerprint any hashes to discover the right Hashcat mode to use to retrieve a password.
Apple has four iPhone models for the remaining months of 2020, but the most impressive ones are the iPhone 12 Pro and iPhone 12 Pro Max. While the iPhone 12 and iPhone 12 mini are great smartphones, the "Pro" models offer more advanced features, especially for photographers and augmented reality enthusiasts.
Not much about 2020 is what you'd call normal, but if one thing remains the same, it's that Apple will still release new iPhone models. This year, the company is offering four new options: two "Pro" models and two "consumer" devices. If you want to know more about the latter two, the iPhone 12 and iPhone 12 mini, keep reading.
