Variables In algebraic expressions, letters represent variables. These letters are actually numbers in disguise. In this expression, the variables are x and y. We call these letters "variables" because the numbers they represent can vary—that is, we can substitute one or more numbers for the letters in the expression. Coefficients ...

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Categorical variables contain a finite number of categories or distinct groups. Categorical data might not have a logical order. For example, categorical predictors include gender, material type, and payment method. Discrete variable Discrete variables are numeric variables that have a countable number of values between any two values.

JS Variables . Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to JS Variables Tutorial. JS Operators . Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to JS Operators Tutorial. JS Data Types . Exercise 1 Go to JS Data Types Tutorial. JS Functions .

In this unit, we learn how to solve linear equations and inequalities that contain a single variable. For example, we'll solve equations like 2(x+3)=(4x-1)/2+7 and inequalities like 5x-2≥2(x-1).

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