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How To: Solve a word problem that involves proportions

In this Education video tutorial you will learn how to solve a word problem that involves proportions. To solve such problems you got to express the scenario in proportions. For example, in the problem, ‘Jacob ran 10 miles in 80 minutes’; this rate can be expressed as 10miles/ 80 minutes. The second part of the problem is to find out ‘at that rate how far would he run in 2.5 hours’? ‘How far’ being a variable, write it as ‘x’ and this can be expressed as x/ 2.5 hours. So, the complete equatio...

How To: Translate a word problem into algebra

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 ...

How To: Hug a girl to show her how you feel about her

Approximately 90% of communication with others is expressed through nonverbal cues, including hand gestures, facial gestures, and insinuation. So if you have a major crush on a girl but don't want to tell her yet, but come in for a hug that squeezes the life out of her, she'd more likely than not realize where you're leaning towards.

How To: Solve multi-step equations with absolute values

This educational math video describes the steps necessary to solve an equation involving absolute values. "Absolute value" refers to the magnitude of a quantity and is always expressed as a positive number. You can think of absolute value as the distance a number would be from zero if plotted on a number line. Positive 17 and negative 17 both have the same absolute value because both are 17 units from zero on a number line. Because of this, all absolute value problems have two answers, one wh...

How To: Normalize a data set into another scale

Comparing evaluations of the same thing done on different scales can seem difficult, but there is a simple equation you can use to translate something expressed in one numerical scale into another. This video will show you how to use it and make your math life easier.

How To: Identify number types

In this video, we learn how to identify number types. You will need to figure out what numbers from a list is a rational numbers in your math equations. A natural number is a counting number (1,2,3). A whole number is a natural number and zero (0,1,2,3). An integer is a whole number and a negative whole (-2,-1,0,1,2). A rational number is any number that can be expressed as a ration of integers. An irrational number is any number that's not rational and non-perfect. Once you understand these ...

How To: Calculate sums in standard form

When a number is expressed in the form of x multiplied by 10^y such that, x < 10 and y is an integer, the number is said to be in standard form. Standard form of expressing numbers finds its use in scientific and statistical fields. This video demostrates how to express, as well as perform basic mathematical operations namely, addition/subtraction, multiplication and division of numbers in the standard form using four examples/mathematical problems. The first two examples demostrate multiplic...

How To: Use Japanese expressions for "lazy"

In this video, we learn how to use Japanese expressions for "lazy". This is difficult to translate for most people, because of how it's expressed and said. Mendo-Kusai is expressing something you don't feel like doing. This is something that takes too much effort, and you can take this to someone casually or with your friends. An example is if you don't feel like doing your homework, or you don't want to walk all the way around a grocery store. This basically means you are being lazy and don'...

How to Speak English: Reported speech with conditionals

In this tutorial, we learn how to speak English with conditionals. Conditional statements need special attention and usually start with the word "if". An example of a conditional statement is "if you want, we'll go out to dinner". This has two parts, a condition, and a result. The condition is expressed by "if". To report them, don't change the verbs unless you're dealing with a real condition. Look and see if verb tenses can change depending on how the sentence is structured. Try to remember...

How To: Mutliply rational numbers and understand word problems

Rational numbers are numbers that can be expressed in the form of a/b, where a, b are integers and b is not equal to zero. Rational numbers are also called as fractions. Multiplication of fractions is very simple and straight forward. Two multiply two fractions a/b, c/d first multiply both the numerators to arrive at the new numerator. Next multiply both the denominators to arrive at the new denominator. Now the new fraction can be further simplified to arrive at the solution. Note that you a...

How To: Draw the graffiti alphabet

To some, graffiti is an art form that can only be expressed on the streets to share with everyone around there. To others, it's nothing more than a stupid way to deface property and cause the city to spend thousands of dollars to clean up. Either way, it take a certain skill set to come up with some great looking graffiti. This tutorial will give those aspiring taggers or artists an idea of how to draw the alphabet graffiti style. Enjoy!

How To: Write a logarithm as a sum or difference of logarithms

This video shows the method to write a logarithm as a sum or difference of logarithms. The square root of the term given is taken out as half according to the rule. Then the numerator and denominator is divided into product of factors. This is broken into the difference of numerator and denominator according to the rule. Finally, the product of factors is expressed as the sum of factors. Now we see the domain of the term. As the term is a square root of the term it should be greater than zero...

How To: Raise well-behaved children

Are you a mom or a dad that has run into a road block with your kids? Are they out of control disobedient? Follow this advice on how to raise well-behaved children and raising your children will be much more rewarding.

How To: Screen urine samples for drugs

In this scientific video tutorial, undergraduate students in a forensic chemistry lab demonstrate how to screen a urine sample for drugs of abuse (or their metabolites). The students employ the ToxiLab system, which performs a thin-layer chromatography separation of the drugs and metabolites prior to chemical development, which gives specific colors for different drugs. Learn how to screen urine samples for drugs! Just like in CSI.

How To: Perform ballistics comparisons

In this scientific video tutorial, undergraduate students in a forensic chemistry lab demonstrate how to use a comparison microscope for bullet and bullet casing comparisons, and color developments tests for impression marking enhancement (such as for filed-off serial numbers). Learn how to perform ballistics comparisons! Just like in CSI.

News: Does Face ID Work When Your iPhone 11, 11 Pro, or 11 Pro Max Is Flat on a Table?

While there is a lot to love about Apple's latest suite of iPhone models, the real draw comes down to the cameras. The iPhone 11, 11 Pro, and 11 Pro Max all have killer rear camera systems, but the front camera was also improved. Apple claims Face ID works at more angles than before in these models, which begs the question: can you unlock your iPhone when it's flat on a table?

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