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# 7th Unit 2

### One Variable Equations and Inequalities

TermDefinition
Adjacent angles two non-overlapping angles that share a common vertex and exactly one ray
Basic needs minimum necessities
Budget a monthly or yearly spending and savings plan for an individual, family, business, or organization
Coefficient a number that is multiplied by a variable(s)
Complementary angles two angles whose degree measures have a sum of 90°
Compound interest for an investment interest that is calculated on the latest balance
Congruent angles angles whose angle measurements are equal
Constant a fixed value that does not appear with a variable(s)
Coupon an amount deducted from the total cost of an item
Equation a mathematical statement composed of algebraic and/or numeric expressions set equal to each other
Family budget estimator determines the monthly or annual base income that is needed for a family
Inequality a mathematical statement composed of algebraic and/or numeric expressions set apart by an inequality symbol
Order of operations the rules of which calculations are performed first when simplifying an expression
Positive rational numbers the set of counting numbers that can be expressed as a fraction
Principal of an investment the original amount invested
Rebate an amount returned or refunded for purchasing an item or items
Sale a reduced amount or price of an item
Simple interest for an investment interest paid on the original principal in an account
Solution set a set of all values of the variable(s) that satisfy the equation or inequality
Straight angle an angle with rays extending in opposite directions and whose degree measure is 180°
Supplementary angles two angles whose degree measures have a sum of 180°
Variable a letter or symbol that represents a number
Vertical angles a pair of non-adjacent, non-overlapping angles formed by two intersecting lines creating angles that are opposite and congruent to each other
Wage the amount usually earned per hour or over a given period of time
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