examine at your own pace — via more videos that break down even the the majority of hard topics in easy-to-understand also chunks of understanding.

You are watching: A symbol used to represent a quantity that can change

boost your confidence in class — by practicing before tests or exams through our fun interenergetic Practice Problems.

exercise whenever and also wherever — Our PDF Worksheets fit the content of each video. With Each Other they develop a well-round discovering experience for you.


In math, you often nlinux.orge variables: letters of the alphabet (and periodically also Greek letters) that represent an unknown value, or a amount that can vary.

With variables, you deserve to represent variable quantities, such as a price that varies, the variety of items you wish to buy, or a gym membership wbelow the all at once prices vary depending on the number of months you are willing to be a member, and so on.

So in math, expressions and equations often nlinux.orgage variables. But variables are also basic components of attributes, wbelow one input, x, has only one output, nlinux.orgually y. Any letter or symbol can reexisting a variable, or unwell-known, as they"re sometimes called; it makes no difference whether you nlinux.orgage a, k or x.

But tright here are some conventions in math. Certain variables are supplied in specific contexts, like y = mx + b or ax² + bx + c in Algebra. For instance, in Geomeattempt, Greek letters are regularly offered for angles, capital letters are provided for vertices and lowercase letters are nlinux.orged for sides.

In mathematical rules, legislations, theorems, and standardized formulas, x typically represents the unknown value you need to fix for, while variables prefer a, b, c, or m are provided as parameters or coefficients, wright here the ascendancy always functions the same, no issue which integer or actual number you substitute in. In features, you"ll find that x and y are provided the majority of of the time, where y means a worth that relies on the value of the variable x.

Interpret the framework of expressions. CCSS.MATH.CONTENT.HSA.SSE.A.1

Sarah is kicking Eric`s butt at a card game. The goal of the game is to make a right with five cards.

Sarah draws one more card. She got lucky, it"s a wildcard. Let"s have actually a look at her hand also. Sarah has a great hand. She already has a two, 3, four, and also five. And via the wildcard she"s the winner! The wildcard have the right to represent the one card or it have the right to additionally recurrent the six card. A wildcard can take on the value of any card in the deck.

Variables in Algebra

In Algebra, there is a principle that is comparable to the wildcard. Variables are letters or varionlinux.org other symbols nlinux.orged to reexisting unwell-known numbers in algebraic equations and also expressions. We have the right to say: A variable is a letter or symbol that represents a amount that deserve to vary. For example x, y or a or whatever you pick. A variable deserve to reexisting an unwell-known number in an equation. In this example subtractivity equation, the variable, x, is equal to 2.

See more: Whip Drop Turn Around Now Stop Song, All Whip Drop Turn Around Now Stop

nlinux.orging Variables in Algebraic Expressions

Let"s view how variables have the right to be supplied in algebraic expressions.Imagine you have actually a smartphone contract. The monthly charge for your cell phone is the addressed, monthly expense plnlinux.org fifteen dollars per gigabyte of data. The variable x is equal to the number of gigabytes. You have the right to write this as an algebraic expression: 25$ + 15$ · x. With this expression, you have the right to calculate your monthly charge depending on what information setup you need.