Reasoning with linear equations | Solving equations & inequalities | Algebra 1 | Khan Academy
When we perform operations to manipulate equations, some operations produce equivalent equations, while others don't necessarily produce equivalent equations. When we're solving an equation, we need to use operations that guarantee equivalence. ... https://www.youtube.com/watch?v=BV-TGIMUXaw Note: All Khan Academy content is available for free at (www.khanacademy.org)
David, Paige, and Jake cover the fascinating history of the possessive apostrophe. Stay tuned for this bonus video!
Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/v/bonus-history-of-the-apostrophe
Punctuation on Khan Academy: Punctuation is the collection of squiggles, dots, and lines that we use to separate sentences and their parts. Is a question mark punctuation? Yes, and so is an exclamation point!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
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https://www.youtube.com/watch?v=BjIPqJ0paXI
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Primer on the differences of language and religion that helped to propel World War I. Created by Sal Khan.
Watch the next lesson: https://www.khanacademy.org/humanities/world-history/euro-hist/world-war-i-tutorial/v/alliances-leading-to-world-war-i?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory
Missed the previous lesson? https://www.khanacademy.org/humanities/world-history/euro-hist/world-war-i-tutorial/v/alliances-leading-to-world-war-i?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory
World history on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound peoples and nations together — and torn them apart. Take a journey through time and space and discover the fascinating history behind the complex world we inhabit today.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
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https://www.youtube.com/watch?v=6RKMRBxDm20
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Congurent shapes and transformations example 2
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https://www.youtube.com/watch?v=7Rb3V-HyVD8
Note: All Khan Academy content is available for free at (www.khanacademy.org)
What unit vectors are and how to construct them
Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/matrix_transformations/lin_trans_examples/v/introduction-to-projections?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/matrix_transformations/lin_trans_examples/v/rotation-in-r3-around-the-x-axis?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Linear Algebra on Khan Academy: Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
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https://www.youtube.com/watch?v=lQn7fksaDq0
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Gradient vectors always point perpendicular to contour lines.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
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https://www.youtube.com/watch?v=ZTbTYEMvo10
Note: All Khan Academy content is available for free at (www.khanacademy.org)
See how we can use improper integrals to approximate the infinite sum of 1/n_.
Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-estimating-inf-series/v/alternating-series-error-estimation?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC
Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-estimating-inf-series/v/integrals-estimating-p-series?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC
AP Calculus BC on Khan Academy: Learn AP Calculus BC - everything from AP Calculus AB plus a few extra goodies, such as Taylor series, to prepare you for the AP Test
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
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https://www.youtube.com/watch?v=8I_KtODUekU
Note: All Khan Academy content is available for free at (www.khanacademy.org)
The Crusades begin in reaction to Pope Urban II's call to help the Byzantine Empire reclaim land from Muslim rule (especially Jerusalem).
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https://www.youtube.com/watch?v=NGyCpI1zE6k
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Sal models the distribution of a chain letter using an exponential function.
Watch the next lesson: https://www.khanacademy.org/math/high-school-math/math2/math2-exponential-growth/math2-construct-exponential-models/v/constructing-exponential-models-half-life?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath
Missed the previous lesson? https://www.khanacademy.org/math/high-school-math/math2/math2-exponential-growth/math2-interpreting-exponential-rate/v/interpreting-time-in-exponential-models?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath
High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
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https://www.youtube.com/watch?v=FRW7SINSYco
Note: All Khan Academy content is available for free at (www.khanacademy.org)