An algebraic equation contains one or more letters in it. Each letter in the equation is called a variable. A variable can change in value. We guess at different values for each letter until our ...

Simultaneous equations are two linear equations that can be solved using bar models. By remembering that the same letter will always have the same value we can work out the missing values. To solve ...

Imagine an AI that can buy, sell, and invest for you. This isn’t sci-fi, it’s already here. On this week's Financial Freestyle, host Ross Mac speaks with Louis Amira, co-founder and CEO of Circuit & ...

Carol M. Kopp edits features on a wide range of subjects for Investopedia, including investing, personal finance, retirement planning, taxes, business management, and career development. Some active ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Amy is an ACA and the CEO and founder of OnPoint ...

Plastics are woven into every aspect of our lives, but what was once the poster child for convenience is fast becoming a pariah product. The era of single-use plastic must end; banning it is the only ...

TO THE EXTENT THAT HE WAS AT HOME anywhere, David Foster Wallace was at home in the world of math. As an undergraduate, he studied modal logic; Everything and More, his book on infinity, explained ...

U.S. President Donald Trump has once again claimed he averted a war between India and Pakistan by using the threat of steep trade tariffs. Referring to India’s Operation Sindoor, launched after the ...

For 30 years, the technology that could help save the world has been in the hands of children. Solar calculators were such a routine part of math class from the mid-1980s onward that they barely ...