If you enjoy solving puzzles, you are going to love algebra! Algebra is used in Maths when we do not know the exact number or numbers in an equation. In place of these missing numbers, we use letters ...

Support your confidence in this topic by refreshing your knowledge of substitution and changing the subject of formulae. A function takes an input value, applies a rule to it, and produces an output ...

This article proposes a new method of selecting demand-shift instruments for disaggregated industries. I use prior information from input-output tables to identify industries whose output fluctuations ...