18 videos in "Evaluating Expressions"

Expressions & Formulas

Variables, Expressions, and Equations

Addition and Subtraction

Multiplication and Division

Operations and Expressions

Evaluating mathematical expressions

Evaluating an expression

Evaluating Expressions with Three Variables

Evaluate Expression for Two Variables

What is an Algebraic Expression

What is a Variable

Equivalent Expressions

Simplifying Expressions with Addition and Subtraction

Simplifying Expressions with Subtraction and Multiplication

Simplifying Expressions with Division

Simplifying Expressions with Division

Simplify Numerator and Denominator of Expressions

Simplifying Basic Expressions
Variables, Expressions, and Equations
Variables, Expressions, and Equations
14887 views, 4 ratings  00:08:17
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.
(
download video
)
Learn to evaluate expressions given values of a variable. Also, learn to determine whether a value is a solution to an equation.
 What is a variable?
 How do you work with variables in expressions and equations?
 What is an expression and how do you evaluate an expression?
 How do you evaluate the expression x + 5 if x = 4?
 How do you evaluate the expression 2x  9 if x = 4?
 How do you evaluate the expression 3x^2  17 if x = 4?
 What is x + y if x = 3 and y = 1?
 How do you evaluate 2x  y if x = 3 and y = 1?
 What does (3x  y^2)/(2xy) equal if x = 3 and y = 1?
 Is x = 5 a solution to x + 2 = 6?
 Is x = 5 a solution to 2x + 2 = x^2  13?
This lesson will walk you though the idea of replacing a variable with a value in an expression and then evaluating the value of the expression. All terminology is defined and all steps are explained as you go through some example problems. Determining if values of a variable are solutions to equations or not.