How do you evaluate variable expressions?
1 Answer
To evaluate a variable expression means to find the value of the expression when the variable is (or variables are) replaced by a number (or numbers).
Here is a variable expression:
To evaluate this expression when
When
If we evaluate the same expression when
Here's a variable expression with two variables :
In order to evaluate this expression, we'll need values (numbers) for both
Evaluate the expression
If we change the values to
Note:
To avoid saying exactly the same thing over and over, we use the following to mean the same thing:
evaluate the expression when
evaluate the expression for
evaluate the expression at
evaluate the expression assuming
evaluate the expression if
Also
If there is only one variable in an expression, we don't always need to mention it:
evaluate the expression for
evaluate the expression at