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a variable to represent the unknown quantity. || used to represent a number. ||
 * **Term** || **Lesson** || **Definition** ||
 * **Absolute Value** || 1-3 || How far is the number from zero. ||
 * **Additive Inverse** || 1-4 || An interger and its oppostite. ||
 * **Algebra** || 1-2 || expresses with variables. ||
 * **Algebraic Expression** || 1-2 || contains a variable, a number and at least one operation. ||
 * **Coordinate** || 1-3 || Goes with the number that matches on a number line. ||
 * **Counterexample** || 1-2 || An example which disproves a proposition. For example, the prime number 2 is a counterexample to the statement "All prime numbers are odd." ||
 * **Define A Variable** || 1-7 || by assigning
 * **Equation** || 1-7 || mathematical sentence containing two expressions separtated by equil signs ||
 * **Evaluate** || 1-2 || to find the value. ||
 * **Inequality** || 1-3 || Contains < > Greater then and less then. ||
 * **Integer** || 1-3 || Negative and Positive numbers. ||
 * **Inverse Operations** || 1-9 || The operation that reverses the effect of another operation. ||
 * **Negative Number** || 1-3 || A number that is less then zero. ||
 * **Numerical Expression** || 1-2 || one with only numbers and operations. ||
 * **Opposites** || 1-4 || the same abolute value but different signs. ||
 * **Order of Operations** || 1-2 || PEMDAS ||
 * **Powers** || 1-2 || Expressions such as x by the 3rd power ||
 * **Solution** || 1-9 || values ||
 * **Solve** || 1-9 || you are finding the values of the variable that make the equation true ||
 * **Variable** ||
 * 1-2 ||
 * a symbol, usually a letter,