The plural of formula is formulae or formulas. Formulae contain equals signs, as do equations, so it can sometimes be difficult to tell the difference between an equation and a formula.

We may be asked to 'change the subject' of the formula so that one of the other variables is the subject and is on its own on one side of the \(=\) sign. The process of solving a linear equation ...

Introduces ordinary differential equations, systems of linear equations, matrices, determinants, vector spaces, linear transformations, and systems of linear differential equations. Prereq., APPM 1360 ...