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Probability and Statistics
Free Online Algebra-Basics Courses
Algebra is about finding the unknown or it is about putting real life problems into equations and then solving them. This tutorial is not exactly dealing with algebra but it is a survey of all of the most important pre-algebra skills.
Variables, Expressions and Equations
An algebraic expression comprises both numbers and variables together with at least one arithmetic operation whereas a variable is an alphabetic character representing a number.
A graph is a two dimensional drawing showing a relationship by means of a line, curve, a series of bars, or other symbols. Typically, an independent variable is represented on the horizontal line (X-axis) and a dependent variable on the vertical line (Y-axis).
Powers and Exponents
A power is the product of multiplying a number by itself. Usually, a power is represented with a base number and an exponent. The base number tells what number is being multiplied. The exponent, a small number written above and to the right of the base number tells how many times number to be multiplied.
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