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# Algebra Chapter 1

Question | Answer |
---|---|

variable | a letter or symbol used to represent a value that can change. |

coefficient | a number multiplied by a variable. |

constant | a value that does not change |

numerical expression | may contain only constants and operations |

algebraic expression | may contain variables, constants, and operations. |

power | an expression written with an exponent and a base or the value of such an expression. |

square root | a number that is multiplied by itself to form a product |

perfect square | a number whose positive square root is a whole number. |

natural numbers | counting numbers: 1,2,3,... |

whole numbers | Natural numbers and zero: 0,1,2,3... |

integers | whole numbers and their opposites: -3, -2, -1, 0, 1, 2, 3.... |

rational numbers | can be expressed in the forms a/b where a and b are both integers and b is not equal to 0. |

terminating decimals | rational numbers in decimal form that have a finite number of digits. |

repeating decimals | rational numbers in decimal form that have a block of one or more digits that repeats continuously. |

irrational numbers | cannot be expressed in the form a/b. They include square roots of whole numbers that are not perfect squares and nonterminating decimals that do not repeat. |

additive inverse | A number and its opposite. Their sum is zero. |

reciprocal | Two numbers whose product is 1. |

absolute value | The distance of the number from zero on a number line. |

Created by:
galbreath01