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# C2_Chapter 1

### Chapter 1 Vocabulary

QuestionAnswer
Algebra The branch of mathematics that involves expressions with variables.
Algebraic Expression A combination of variables, numbers, and at least one operation.
Arithmetic Sequence A sequence in which each term is found by adding the same number to the previous term.
Base In a power, the number used as a factor. In 10^3, the base is 10. That is, 10^3 = 10 × 10 × 10.
Coefficient The numerical factor of a term that contains a variable.
Defining The Variable Choosing a variable to represent an unknown value in a problem, and using it to write an expression or equation to solve the problem.
Domain The set of input values for a function.
Equation A mathematical sentence that contains an equals sign, =.
Equivalent Expressions Expressions that have the same value.
Evaluate To find the value of an expression.
Exponent In a power, the number that tells how many times the base is used as a factor. In 53, the exponent is 3. That is, 53 = 5 × 5 × 5.
Factors Two or more numbers that are multiplied together to form a product.
Function A relation in which each element of the input is paired with exactly one element of the output according to a specified rule.
Function Rule The operation performed on the input of a function.
Numerical Expression A combination of numbers and operations.
Order of Operations The rules to follow when more than one operation is used in a numerical expression.
Perfect Squares Numbers with square roots that are whole numbers. 25 is a perfect square because the square root of 25 is 5.
Powers Numbers expressed using exponents. The power 3^2 is read three to the second power, or three squared.
Radical Sign The symbol used to indicate a nonnegative square root, √.
Range The set of output values for a function.
Sequence A list of numbers in a certain order, such as 0, 1, 2, 3, or 2, 4, 6, 8.
Solution A value for the variable that makes an equation true. The solution of 12 = x + 7 is 5.
Square The product of a number and itself. 36 is the square of 6.
Square Root One of the two equal factors of a number. The square root of 9 is 3.
Term Each number in a sequence.
Variable A placeholder, usually a letter, used to represent an unspecified value in mathematical expressions or sentences. In 3 + a = 6, a is a variable.
Created by: Mrs_Irish