Peter Badge. Mathematics often feels like a collection of isolated islands. Each one operates with its own rules, and ...

👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of ...

👉Learn how to solve quadratic functions. Quadratic equations are equations whose highest power in the variable(s) is 2. They are of the form y = ax^2 + bx + c. There are various techniques which can ...

Mental math shortcuts suggest future STEM performance—and gender is a significant predictor What is 29 + 14?

Gerd Faltings proved a conjecture that had been unsolved for six decades, using connections between numbers and geometry.

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...