1. Math Vocabulary

2. Algebra The area of mathematics where letters (like x or y) or other symbols are used to represent unknown numbers. Example: in x - 5 = 2, x is unknown. The area of mathematics where letters (like x or y) or other symbols are used to represent unknown numbers. Example: in x - 5 = 2, x is unknown.

3. Expression - Numbers, symbols and operators (such as + and ×) grouped together that show the value of something. Expressions do not have equal signs. 4x – 7y + 11

4. 4x - 7y + 11 Term - In Algebra a term is either a single number or a variable, or numbers and variables multiplied together. Q1. List the terms from the example above?

5. 4x -7y + 2x -11 Like Terms – two or more terms that have the same variables. They can be combined or simplified. Unlike Terms – two or more terms that do NOT have the same variables. They cannot be simplified. Q2. What are the like terms above?

6. 4x - 7y + 11 Variable - A symbol for a number we don't know yet. It is usually a letter like x or y. Example: in x + 2 = 6, x is the variable If it is not a variable it is called a Constant. Q3. How many different variables are in the above expression?

7. 4x - 7y + 11 Constant - In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number. A fixed value. Example: in x + 5 = 9, 5 and 9 are constants If it is not a constant it is called a variable.

8. 4x - 7y + 11 Coefficient - A number used to multiply a variable. Example: 4x means 4 times x (multiply me!), and x is a variable, so 4 is a coefficient. Q4. What is the coefficient of y in the above expression?

9. 4x - 7y + 11 Operator - a symbol (such as +, ×, etc) that represents an operation (i.e. you want to do something with the values). Q5. Is the second term a negative 7 or minus 7?

10. 4x - 7 = 5 Equation - An equation says that two things are the same, using mathematical symbols. An equal sign (=) is used Example: 7+2 = 10-1

11. Why does this symbolize an equation?

12. Describe the Variable Expression Variable Expression MeaningOperation 8y, 8 y, (8)(y) 8 times yMultiplication, 16  b 16 divided by b Division 4 + s4 plus sAddition 9 - x9 minus xSubtraction

13. Substitute and Solve 3 + n = ? 5n + 5 = ? 20/n = ? 3 + 4 = 7 5(4) + 5 = 20 + 5 = 25 20/4 = 5 Solve these equations if n = 4

14. Evaluate each expression y = 2 ExpressionSubstituteSimplify 5y y + 6 14 - y