1 1 Variables and Expressions Vocabulary Variable Symbols

1. 1 Variables and Expressions

Vocabulary ¡ Variable: Symbols used to represent unspecified numbers or values. l l l Typically you use the first letter of the word that describes the unspecified value. For example: if you’re trying to solve for Area, you use an A as the variable x & y are common variables as well

More vocabulary ¡ Algebraic Expression: Consists of one or more numbers and variables along with one or more arithmetic operations.

How do you write an expression that shows multiplication? Factors: The quantities being multiplied ¡ Product: The result of a multiplication problem. ¡

Exponents Exponent or Power Base ¡ The exponent indicates the number of times the base is used as a factor.

Write an algebraic expression for each verbal expression. ¡ Example #1 l A) eight more than a number l B) 7 less the product of 4 and a number x. l C) one third of the original area a. l D) the product of 7 and m to the fifth power.

To evaluate an expression means to find its value. ¡ Example #2 l ¡ Evaluate 26 64 Example #3: Write a verbal expression for each algebraic expression. l A) 4 m 3 l B) c 2 + 21 d The product of 4 and m to the 3 rd power c squared plus the product of 21 and d These answers aren’t the only way of writing the expression.

Homework Assignment # 1 ¡ p. 8 14 -46 even