Functions is an important concept in mathematics to grasp. These sites, blogs and videos do an excellent job of explaining it visually and offer all these videos and more resources for free. Hope this ...

Excel has over 475 formulas in its Functions Library, from simple mathematics to very complex statistical, logical, and engineering tasks such as IF statements (one of our perennial favorite stories); ...

A survey of contemporary topics in mathematics such as: voting systems and power, apportionment, fair division of divisible and indivisible assets, efficient distribution, scheduling and routing, ...