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7th Grade Math ISS

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
complex fraction   A fraction A/B where A and/or B are fractions (B nonzero).  
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multiplicative inverse   Two numbers whose product is 1 are multiplicative inverses of one another. Example  
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constant of proportionality   The constant value of the ratio of two proportional quantities x and y.  
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proportions   A mathematical sentence stating that two ratios are equal.  
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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.  
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percent of change(increase/decrease)   A rate of change expressed as a percent. Example  
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percent of error   Show error as a percent of the exact value.  
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markup   Money added to the original cost by the seller  
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tax   a percent of money required by the government added to products or services  
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tip/gratuity   amount of money given to a person that has performed a service.  
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commission   A fee paid for services, usually a percentage of the total cost.  
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sales tax   a tax on goods and services purchased and is normally a certain percentage added to the buyer's cost.  
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additive inverse property   Two numbers whose sum is 0 are additive inverses of one another. Example  
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expression   A collection of numbers, symbols, and/or operation signs that stands for a number.  
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equation   A mathematical sentence in which two expressions are connected by an equality symbol.  
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inequality   is a mathematical sentence that uses symbols such as <, ≤,="">, or ≥ to compare two quantities.solution set  
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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.  
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scale   The numeric values, set at fixed intervals, assigned to the axis of a graph.  
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scale model   A model or drawing based on a ratio of the dimension for the model and the actual object it represents.  
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dimensions   A measurement of length in one direction cross-section.  
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radius   A line segment extending from the center of a circle or sphere to a point on the circle or sphere.  
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diameter   A straight line going through the center of a circle connecting two points on the  
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circumference.circumference   perimeter of a circle  
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supplementary angles   two angles that measure 180 degrees.  
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complimentary angles   two angles that measure 90 degrees.  
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vertical angles   A point at which the arms (sides) of an angle meet is known as the vertex of the angle.  
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adjacent angles   are angles just next to each other  
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population   The whole group from which a sample is taken.  
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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.  
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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).  
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theoretical probability   the likeliness of an event happening based on all the possible outcomes.  
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experimental probability   the ratio of the number of times an event occurs to the total number of trials or times the activity is performed.  
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sample size   In a probability model for a random process, a list of the individual outcomes that are to be considered.  
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compound event   A compound event consists of two or more outcomes or simple events.  
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Created by: lroberts2033
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