Examlex
Factor the difference of two squares.
Demographic Information
Data relating to the characteristics of a population or specific groups within it, such as age, sex, income, and employment status, often used in research to identify patterns or trends.
Web Survey
A research method involving the collection of data through questionnaires or surveys distributed over the Internet.
Observational Data
Data collected by observing subjects in their natural environment without interference or manipulation by the observer.
Polygraph
A device used to measure and record bodily responses such as heart rate and perspiration, used in an attempt to determine whether someone is telling the truth.
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Q38: Solve the system by substitution, if possible.
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Q61: Using the figure below, sketch a graph