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# 7th Grade Math ISS

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

complex fraction | A fraction A/B where A and/or B are fractions (B nonzero). |

multiplicative inverse | Two numbers whose product is 1 are multiplicative inverses of one another. Example |

constant of proportionality | The constant value of the ratio of two proportional quantities x and y. |

proportions | A mathematical sentence stating that two ratios are equal. |

cross products | two equal products obtained by multiplying the second term of each ratio by the first term of the other ratio in a production. |

percent of change(increase/decrease) | A rate of change expressed as a percent. Example |

percent of error | Show error as a percent of the exact value. |

markup | Money added to the original cost by the seller |

tax | a percent of money required by the government added to products or services |

tip/gratuity | amount of money given to a person that has performed a service. |

commission | A fee paid for services, usually a percentage of the total cost. |

sales tax | a tax on goods and services purchased and is normally a certain percentage added to the buyer's cost. |

additive inverse property | Two numbers whose sum is 0 are additive inverses of one another. Example |

expression | A collection of numbers, symbols, and/or operation signs that stands for a number. |

equation | A mathematical sentence in which two expressions are connected by an equality symbol. |

inequality | is a mathematical sentence that uses symbols such as <, ≤,="">, or ≥ to compare two quantities.solution set |

scale factor | The constant that is multiplied by the length of each side of a figure that produces an image that is the same shape as the original figure, but a different size. |

scale | The numeric values, set at fixed intervals, assigned to the axis of a graph. |

scale model | A model or drawing based on a ratio of the dimension for the model and the actual object it represents. |

dimensions | A measurement of length in one direction cross-section. |

radius | A line segment extending from the center of a circle or sphere to a point on the circle or sphere. |

diameter | A straight line going through the center of a circle connecting two points on the |

circumference.circumference | perimeter of a circle |

supplementary angles | two angles that measure 180 degrees. |

complimentary angles | two angles that measure 90 degrees. |

vertical angles | A point at which the arms (sides) of an angle meet is known as the vertex of the angle. |

adjacent angles | are angles just next to each other |

population | The whole group from which a sample is taken. |

inference | the process of arriving at some conclusion that, though it is not logically derivable from the assumed premises, possesses some degree of probability relative to the premises. |

probability | A number between 0 and 1 used to quantify likelihood for processes that have uncertain outcomes (such as tossing a coin, selecting a person at random from a group of people, tossing a ball at a target, or testing for a medical condition). |

theoretical probability | the likeliness of an event happening based on all the possible outcomes. |

experimental probability | the ratio of the number of times an event occurs to the total number of trials or times the activity is performed. |

sample size | In a probability model for a random process, a list of the individual outcomes that are to be considered. |

compound event | A compound event consists of two or more outcomes or simple events. |

Created by:
lroberts2033