This **article aims** to find the **definition of formula, modeling, and models. This **article uses the concept of **formula, modeling, and models**. In mathematics, a** formula** is a fact, rule, or principle expressed using mathematical symbols. **Examples** of formulas include **equations**, **equalities,** **identities**,** inequalities**, and **asymptotic expressions**.

A **mathematical model** usually describes a system using a set of variables and a set of equations that establish relationships between the variables. Variables can be of many types; for **example**, **real or integer numbers**, **Boolean values,** or strings. **Variables** represent some properties of system, for example the outputs of the measured system often in the form of signals, time data, counters and occurrence of events. A **real model** is a set of functions that describe the **relationships between different variables.**

**Expert Answer**

A** formula** is also an **equation** that expresses a relationship between two or more variables. The act of finding patterns to** describe real-world phenomena** is called **modeling**. A** formula models real-world phenomena**, meaning that the formula gives a **relationship between variables representing real-life situations**.

Thus, a **complementing statement** is “An equation that expresses a relationship between two or more variables, such as $ H = \dfrac { 9 } { 10 } ( 220 – a )$ is called $ \dfrac { a } { an } $ formula. **Process** of finding such equations to explain real-**world phenomena** is called** mathematical modeling**. Such equations and the meaning assigned to the variables are called **mathematical models”**.

**Numerical Result**

A **formula** can also be called an **equation** that expresses a **relationship between two or more variables. **The **act of finding patterns** to describe real-world phenomena is called **modeling**.

A formula models real-world phenomena, meaning that the formula gives a relationship between variables **representing real-life situations**.

Thus, a **complementing statement** is “An **equation that expresses a relationship** between **two or more variables**, such as $ H = \dfrac { 9 } { 10 } ( 220 – a ) $ is called $\dfrac { a } { an } $ formula. **Process of finding** such equations to describe real-world phenomena is called **mathematical modeling**. Such **equations and the meaning** assigned to the **variables** are called **mathematical models.”**

**Example**

**An equation that represents a relationship between two or more variables, such as $ Z = 0.1 x + 20 $, is called ? Process of finding such equations to describe real-world phenomena is called mathematical. Such equations and the meaning assigned to the variables are called mathematical.**

**Solution**

An **equation that represents a relationship** between two or more variables, for example $ Z = 0.1 x + 20 $, is called a** formula.**

A **formula** is an equation that represents a relationship between two or more variables.

The process of finding patterns to describe real-world** phenomena** is called **mathematical modeling**.

Such equations and the meaning assigned to the **variables** are called **mathematical models.**