Lesson 1.1--Evaluating Algebraic Expressions
To evaluate algebraic expressions
variable algebraic expression evaluate
coefficient constantsubstitute
A variable is a letter that represents a value that can change or vary.
The coefficient is the number multiplied by the variable.
An algebraic expression has one or more variables.
In the algebraic expression x+6, 6 is the constant because it does not change.
To evaluate an algebraic expression, substitute a given number for the variable, and find the value of the resulting numerical expression.
Example: Evaluating Algebraic Expressions With One Variable
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Example: Evaluating Algebraic Expressions With Two Variables
Evaluate each expression for the given values of the variables.
Example: Physical Science Application
Use the expression 1.8c + 32 to convert the boiling point temperature from degrees Celsius to degrees Fahrenheit.
Evaluate each expression for the given values of the variables.
5. If n is the amount of money in a savings account, then the expression n + 0.03n can be used to find the amount in the
account after it has earned interest for one year. Find the total in the account after one year if $500 is the initial amount.
HW: p. 8­9 16­46 even, 47, 48, 52, 54 = 20 problems 2