👉 Learn how to solve equations from word problems. A word problem is a real word simulation of a mathematics principle. We can solve equation(s) from a word problems by first understanding what the problem is asking. We then assign...

Algebra 49, 50 and 51 present three real-world problems which can be solved using systems of three linear equations in three variables. This chapter shows how the parameters of an equation for a parabola can be determined, given three...

👉 Learn how to simplify mathematics expressions. A mathematis expression is a finite combination of numbers and symbols formed following a set of operations or rules. To simplify a mathematics expression means to reduce the expression...

Henderson-Hasselbalch Equation using mass balance equation for system of two equations with two unknowns

This video continues illustrating the 3 step problem solving plan for solving word problems. This video goes over 5 challenging examples illustrating how to translate word problems that contain three facts and three unknowns into equations.

This video introduces a 3 step problem solving plan for solving word problems. This video goes over 3 examples illustrating how to translate word problems into equations.

In this video, the teacher explains the commutative property of addition and how it can be used to solve addition problems with unknown add-ins or sums. The teacher provides examples and encourages students to reorder add-ins to make...

The Dunning-Kruger effect is a cognitive bias whereby the less someone knows about something, the more they overestimate their abilities in it! What is this ignorance of ignorance? And what can we do about it?

In this lesson, students will learn how to solve for unknown amounts using the commutative property of multiplication. They will understand that the order of the factors can be switched without changing the product.

The Saatchi Gallery in London has handpicked a selection of work by seventeen contemporary artists relatively unknown to the general public and is featuring it at a major exhibition.



“We called it Known...

Jackie Forrest on why investors are wary of putting their money into an industry with so many unknowns

Stephanie MacLellan of the Centre for International Governance Innovation on why companies are resistant to expanded digital police powers

The 18-year-old swim star confirms that after worlds in Singapore she will be making the move to Austin, Texas to train under Michael Phelps’ former coach Bob Bowman, saying “I know he’s going to make me reach my full capacity and...

With the Vatican now in sede vacante after the death of Pope Francis, CBC's Jonathan Montpetit looks ahead to the conclave and who might be in line to become the next pontiff.

Nobel laureate Paul Krugman, a distinguished professor at the City University of New York, says the US is in a trade war. He also says he's shocked at how fast consumer expectations have deteriorated due to economic uncertainty. He...

A Sentinel from the 3rd U.S. Infantry Regiment, also called the Old Guard, marches while guarding The Tomb of the Unknowns on Veterans Day at Arlington National Cemetery November 11, 2014 in Arlington, Virginia. Originally established as...

A Sentinel from the 3rd U.S. Infantry Regiment, also called the Old Guard, marches while guarding The Tomb of the Unknowns on Veterans Day at Arlington National Cemetery November 11, 2014 in Arlington, Virginia. Originally established as...

Prince Harry Salutes at Arlington Cemetery

Sentinels from the 3rd U.S. Infantry Regiment, also called the Old Guard, conduct the changing of the guard at The Tomb of the Unknowns on Veterans Day at Arlington National Cemetery November 11, 2014 in Arlington, Virginia. (Footage by...

Taps is performed during the Full Honors Wreath-Laying Ceremony at The Tomb of the Unknowns on Veterans Day at Arlington National Cemetery November 11, 2014 in Arlington, Virginia. (Footage by Chip Somodevilla/Getty Images)

Honor guards from all the branches of the U.S. military march away after participating in the Full Honors Wreath-Laying Ceremony at The Tomb of the Unknowns on Veterans Day at Arlington National Cemetery November 11, 2014 in Arlington,...

The Bank of Russia is raising its key interest rate to 20%. It had been at 9.5%. The central bank says external conditions have drastically changed and the hike is necessary to make bank deposits attractive. Bloomberg Economics' Scott...

Oct.01 -- Moelis & Company India Chief Executive Officer and industry veteran Manisha Girotra says the excitement around IPOs in India is justified as the market has seen a straight-line rise in the last two months. Manisha served as CEO...

Sept. 27 -- Ellen Zentner, chief U.S. economist at Morgan Stanley, discusses the role of politics at the Federal Reserve, looks at how markets are reflecting the possibility of a Donald Trump presidency, and examines U.S. consumer...