Matrix addition and subtraction is possible when the two matrices you are attempting to add or subtract have the same number of rows and columns.

0:00 Introduction
0:12 Talk about rows and columns agreeing
0:47 Matrix Addition Example
2:10 Matrix Subtraction Example
2:57 Review of topic

#addmatrix
#subtractmatrix
#matrices
#joecmath

The 68 - 95 -99.7 Rule (Empirical Rule) lets us know approximately what percent of the normal distribution exists between the first, second, and third stand deviation of the mean, respectively.

Combining this information with the fact that the normal distribution is symmetric about the mean, we can calculate the percent of the distribution that falls between each standard deviation. This video reminds you how to come up with these percentages on the fly if all you can remember is the 68 - 95 -99.7 Rule (Empirical Rule).

Some images made using Geogebra.

0:00 Introduction
0:25 Percent between first standard deviation of the mean
0:57 Percent between second standard deviation of the mean
1:35 Percent between third standard deviation of the mean
2:01 Percent in tails to infinities

#standarddeviation
#normaldistribution
#joecmath
#statistics

Videos supplement material from the textbook Physics for Engineers and Scientist by Ohanian and Markery (3rd. Edition) (http://books.wwnorton.com/book....s/Physics-for-Engine Feel free to post questions and/or suggestions in the comments and I'll respond if possible. The videos are mostly for my students, but since others seem to find them useful I'll help as much as I possibly can!

The "a" value of a quadratic function in standard form tells us whether our parabola opens upwards (concave up) or downwards (concave down).

If a is positive (a is greater than 0) then the parabola will open upwards.

If a is negative (a is less than 0) then the parabola will open downwards.


#ConcaveUp/Down
#Quadratics
#Algebra

0:00 Introduction
0:11 What positive a tells us
0:25 What negative a tells us
0:48 Positive a examples
0:59 Negative a examples
1:20 Hey you, you should subscribe!

SOHCAHTOA is a useful way to remember the relationship between the sides of a right triangle and the trig functions sine, cosine, and tangent of a particular angle within the triangle.

0:00 Intro
0:25 SOHCAHTOA Overview
2:07 Example
3:00 Thanks for watching!

#SOHCAHTOA
#Trig
#JoeCMath

The distributive property of multiplication over addition is a(b+c)=ab+ac.
The equality of both sides allows us to move in either direction.

In one direction you will generally be told to "distribute" while the other direction is tied with "factoring." It can be hard to associate all these math terms together, but this video attempts to provide simple examples using the distributive property in both directions.


#DistributiveProperty #JoeCMath

0:00 Introduction
0:35 Distribute multiplication over addition example
1:22 Factoring using the distributive property
2:37 Consider subscribing

For an indefinite integral, the constant of integration is usually represented with +C. It represents the constant that can not be determined while completing an indefinite integral without extra information.

If we have a solution to the function we get when we take the integral, we can find the appropriate value of C for the given problem.

0:00 Intro
0:15 Demonstration of where +C comes from
2:23 Process for finding C value

#+C
#ConstantOfIntegration
#Calculus
#Integral
#Antiderivative
#JoeCMath

The three matrix elementary row operations (swap, scale, and add) needed in Gauss-Jordan Elimination are:
1. Switching/swapping/exchanging rows
2. Multiplying row by non-zero constant/scalar
3. Row Addition

You'll use these when solving an augmented matrix or finding the inverse of a square matrix.

0:00 Introduction
0:20 Swap/switch rows
1:08 Multiplying a row by non-zero constant/scalar
2:37 Row addition
4:17 Review of all three row operations

#matrices
#elementaryrowoperations
#guassjordan
#linearAlgebra
#JoeCMath

Converting from a linear system of equations to an augmented matrix involved bringing down the coefficients of equations down in a particular way. It is important that

1. Each column in your augmented matrix only has coefficients from one variables.
2. One row of your augmented matrix has coefficients from only one of the equations.

0:00 Introduction
0:08 System of linear equations for first augmented matrix
1:54 Disordered system of linear equations to convert to augmented matrix

#augmentedmatrix
#matrices
#joecmath

The Pythagorean Theorem relates the lengths of the sides of a right triangle with the following formula:

a^2+b^2=c^2

Where a and b are legs of the triangle and c is the hypotenuse.

#PythagoreanTheorem
#RightTriangle
#JoeCMath
#Trig

0:00 Intro
0:10 Define triangle sides and Pythagorean Theorem
0:50 Example 1
1:55 Example 2
3:23 Example 3
4:00 Example 4
4:48 3 types of problems and their solutions formula

A quick video that explains how to identify and combine like terms within an algebraic expression. This is part of a series in which my goal is to deliver short information dense videos on small topics within mathematics.

Terms are considered like if they:
1. Have the same variables.
2. The power/degree of each variable agrees.

#CombineLikeTerms
#JoeCMath

0:00 Introduction
0:12 Like terms checklist and classification
1:32 Simplifying an expression with like terms
2:00 S+U+B+S+C+R+I+B+E=2(S+B)+U+C+R+I+E

Having trouble finding the area under a given normal curve or distribution? Unsure of how to proceed?

This video quickly introduces two methods for solving homework problems of involving finding the percent of the normal curve above or below a point as well as between two given points.

0:00 Set up to normal distribution problem
0:15 z-score approach to solving problem
0:41 Using standard deviation normal distribution template
1:31 Using quartile normal distribution template

#normaldistribution
#normalcurve
#mathoverview
#joecmath
#statistics

The process of completing the square for a quadratic expression, equation, or function can seem confusing at first.

What do you do when a=1?

What do you when a is not 1?

Well, with the method discussed it doesn't matter what value of a you are working with.


#CompletingTheSquare
#CompleteTheSquare
#StandardtoVertex
#Algebra
#JoeCMath

0:00 Introduction
0:18 Potentially confusing moment, nothing to see here.
0:30 Example 1
2:44 General form beside Example 1
4:20 Example 2
5:40 Interact with channel implies Joe makes more content.

Six examples that require the simplification/combination of exponents using exponent properties are provided with a step-by-step process for simplification.

The four properties that are the main focus in this video are the product, power, quotient, and negative exponent properties. Individual videos for each one of these properties can be found on my channel.


#Exponents
#Simplifying
#MathExamples
#JoeCMath
#ExponentRules
#ExponentProperties

0:00 Introduction
0:15 Easy Example 1
1:51 Easy Example 2
4:02 Easy Example 3
5:44 Medium Example 1
8:17 Medium Example 2
10:55 Hard Example ONLY
15:01 Subscribe if this was helpful!

The first quartile of the normal distribution is found at the mean -0.67 times the standard deviation. The third quartile is found at the mean +0.67 times the standard deviation.

The first quartile, the mean, and the third quartile break down the normal distribution into approximately four equal parts each containing about 25% of the distribution.

The problems involving this breakdown of the normal distribution either use the word quartile or talk about 25, 50, or 75 % of the distribution within the question.

Some images used were generated using Geogebra.

0:00 Introduction
0:11 First Quartile
0:18 Third Quartile
0:24 How the quartiles break up normal curve
0:39 Type of problems using normal distribution quartiles

#quartiles
#normaldistribution
#statistics
#JoeCMath

The end behavior of a polynomial tells us the direction a function goes as x approaches positive or negative infinity. Using just the coefficient and highest power of a polynomial we can determine the end behavior.

Some images made using Geogebra.

0:00 Introduction
0:20 End behavior of 6x^4+5x^3-2x^2+x-20
1:48 The four types of polynomial end behaviors
3:14 End behavior of -0.5x^5+5x^2-x+1
4:03 End behavior of 2x^3-x^6+2x^7+2
4:47 Starting with graph and working backwards

#polynomialendbehavior
#polynomials
#graphingpolynomials
#JoeCMath
#precalculus

Factoring the difference of two squares can be done quickly as long as you can rewrite your expression equation or function in the form a^2-b^2. The factored form will then be (a+b)(a-b).

a^2-b^2=(a+b)(a-b)


#DifferenceOfSquares
#DifferenceofTwoSquare
#Factoring
#Algebra
#JoeCMath

0:00 Introduction
1:00 Example 1
1:39 Example 2
2:16 Example 3
2:35 Example 4
3:18 Yeah... I didn't have a good idea for an outro.

A quick video that relates the Zero Product Property to finding solutions to a factored polynomial.


#ZeroProductProperty
#Solutions
#JoeCMath

0:00 Introduction
0:22 The zero product property
0:40 Example that uses the zero product property
1:39 Zero product property for more than two factors
2:00 Honestly, the best thing I have ever made!

Details the process of completing the square for a quadratic expression. Two examples are given to motivate the process.


#CompletingTheSquare
#a=1
#StandardtoVertex
#Algebra
#JoeCMath

0:00 Introduction
0:32 General process of completing the square.
1:22 Example 1
3:29 Example 2
4:30 Consider subscribing

Finding the y-intercept of a function is easy if you are given the graph, but how do you find it if you are given only a function in a single variable?

Some images made using Geogebra.

#y-intercept
#Findy-int
#JoeCMath
#y-int
#verticalintercept
#yint

0:00 Introduction
0:08 Finding the y-intercept when given the graph
1:40 Steps to find the y-intercept of a function
2:45 What? No unnecessary math outro?