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Explore and simplify algebraic expressions, solve equations, and understand inequalities using order of operations and properties of equality. Learn to evaluate, solve, and graph equations and inequalities.
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Expressions, Equations, and Inequalities Chapter 1
1.3 Algebraic Expressions • Pg. 18-24 • Obj: Learn how to evaluate and simplify algebraic expressions. • A.SSE.1.a
1.3 Algebraic Expressions • Evaluate – substitute a number for each variable in the expression and then simplify using the order of operations • Term – an expression that is a number, a variable, or the product of a number and one or more variables • Coefficient – the numerical factor of a term • Constant Term – a term with no variables • Like Terms – have the same variables raised to the same powers
1.4 Solving Equations • Pg. 26-32 • Obj: Learn how to solve equations and solve problems by writing equations. • A.CED.1, A.CED.4
1.4 Solving Equations • Equation – a statement that two expressions are equal • Solution of an Equation – finding all values of the variable that make the equation true • Inverse Operations – operations that “undo” each other • Identity – an equation that is true for every value of the variable • Literal Equation – an equation that uses at least two different letters as variables
1.4 Solving Equations • Properties of Equality • Reflexive – a=a • Symmetric – If a=b, then b=a • Transitive – If a=b and b=c, then a=c • Substitution – If a=b, then you can replace a with b and vice versa
1.4 Solving Equations • Properties of Equality • Addition – If a=b, then a+c=b+c. • Subtraction – If a=b, then a-c=b-c. • Multiplication – If a=b, then a(c)=b(c) • Division – If a=b, then a/c=b/c
1.5 Solving Inequalities • Pg. 33-40 • Obj: Learn how to solve and graph inequalities and how to write and solve compound inequalities. • A.CED.1
1.5 Solving Inequalities • Compound Inequality – Two inequalities joined with the words “and” or “or” • Inequality Symbols and Graphing • Greater Than - > - open circle • Greater Than or Equal to - > - closed circle • Less Than - < - open circle • Less Than or Equal to - < - closed circle
1.5 Solving Inequalities • Properties of Inequalities • Transitive – If a>b and b>c, then a>c • Addition – If a>b, then a+c>b+c • Subtraction – If a>b, then a-c>b-c • Multiplication – If a>b and c>0, then ac>bc • Division – If a>b and c>0, then a/c > b/c
1.6 Absolute Value Equations and Inequalities • Pg. 41 – 48 • Obj: Learn how to write and solve equations and inequalities involving absolute value. • A.SSE.1.b, A.CED.1
1.6 Absolute Value Equations and Inequalities • Absolute Value – the distance of a number from zero – always positive • Extraneous Solution – a solution derived from an original equation that is not a solution of the original equation