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7th Grade Math ISS

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