To **evaluate** an algebraic **expression** means to find the value of the **expression** when the variable is replaced by a given number. To **evaluate** an **expression**, we substitute the given number for the variable in the **expression** and then simplify the **expression** using the order of operations.

An **expression** is a sentence with a minimum of two numbers and at least one **math** operation.

How do you write a **VARIABLE EXPRESSION**?

Example:

10 and a Number

10 + N

In the above case or situation the word expression is ten ( 10 ) and a number ( N )

If we add or substitute in place of N any number the word expression would hold true

What is a **variable**?

A defining **variable** is a symbol, such as x, used to describe any **number**. When a **variable** is used in an function, we know that it is not just one constant **number**, but that it can represent many **numbers**. ... A **variable** is a letter or a symbol used to represent any **number**.

YOUR QUESTION?

MATHEMATICS IS NUMBERS, LETTERS AKA SYMBOLS, AND OR OTHER.

WE SOLVE PROBLEMS FROM LEFT TO RIGHT MOST OF TIME

I GUESS FIRST THINGS FIRST AND SO ON

In math we also tend to use some **ORDER OF OPERATIONS**.

** YOUR QUESTIONS?**

**Evaluate -2x 2 y, if x = -3 and y = -1.**

-12

-18

18

12

-2X2Y

X is equals to -3

Y is equal to -1

What are the steps to EVAUATE AN EXPRESSION

TBC