What are application of algebra in real life?

Answer 1

It is used to describe the relationships between the assorted numerical values in real applications, and therefore to show how to create the formulae necessary to carry out the application. Examples?

Designing the computer on which you are reading this - not just the electronic circuits but also the mechanical engineering in its case, hard-drive etc.

Establishing the dimensions of the structural members of bridges and cranes.

Designing engines, motors and generators.

Can you see any electricity transmission lines from your window, or near your home? Yes? Well, someone had to use a lot of algebraic formulae to calculate their diameters, strengths, power-ratings, insulators, towers, switch-gear, etc.

Navigating ships and aeroplanes.

Analysing astronomical and other natural-science data.

Economics.

And lots more......