What is a variable?
A variable is a letter that represents an unknown number.
eg. X, A, N.
What is an expression?
An expression is any single number or variable or combination of operations ( Subtraction, addition, multiplication and division) involving numbers and variables.
eg. 5, n, 8t, x+1, 2y-7.
Here is a link to help you if you are still having troubles with variables and expressions:
http://http://www.freemathhelp.com/Lessons/PreAlgebra_Variables_and_Expressions_BB.htm
Good Job Jess! I like how you gave us a link that you think might help us understand what an Expression and Variable is. What I suggest next time is for you to make a picture.
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