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# Chapter 1 Vocab

Term | Definition |
---|---|

Variable | A symbol, usually a letter,that represents one or more numbers. |

Coefficient | The number that is multiplied by the variable in an algebraic expression. |

Expression | A mathematical phrase containing numbers, operations, and/or variables. |

Constant term | A term that has a number but no variable. |

Evaluate (an algebraic expression) | Substitute a number for each variable in an algebraic expression. Then use the order of operations to find the value of the numerical expression. |

Substitute | to replace a variable with a number or another expression in an algebraic expression. |

Equation | A mathematical sentence that uses an equal sign, =, to show that two expressions are equal. |

Solve | to find an answer or a solution. |

Solution of an equation | A value that makes an equation true. |

Inverse Operation | Operations that “undo” each other, such as addition and subtraction or multiplication and division. |

Isolate the Variable | to get a variable alone on one side of an equation or inequality in order to solve the equation or inequality. |

Term | the parts of an expression that are added together. |

Like Term | Terms that have identical variable parts. |

Equivalent Expression | Expressions with the same value. |

Simplify | to write a fraction or expression in simplest form. |

Distributive Property | To multiply a sum or difference by a number, multiply each number in the sum or difference by the number outside the parentheses. Then evaluate. |

Order of Operations | The order in which to perform operations when evaluating expressions with more than one operation |

Ordered pair | A pair of numbers (x, y) used to locate a point in a coordinate plane. The first number is the x-coordinate, and the second number is the y-coordinate |

Integer | The set of whole numbers and their opposites. |

Opposite | two numbers that are an equal distance from zero on a number line |

Absolute Value | The distance between a number and 0 on a number line. The absolute value of a number a is written as |a|. |

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