s  What is a variable?  What does it mean to substitute a number?  Why do we need variables to solve problems.

Slides:

Advertisements

Similar presentations

 Symbolic manipulation with artificial applications …  With little or no connection to the real world…

Advertisements

Solving Systems of Equations and Inequalities Jeopardy

Solving Systems of three equations with three variables Using substitution or elimination.

Variables and Expressions

Lesson 2-4. Many equations contain variables on each side. To solve these equations, FIRST use addition and subtraction to write an equivalent equation.

7.1 Graphing Linear Systems

Section 8.4 Integration of Rational Functions by Partial Fractions.

7.3 Solving Systems of Equations by Elimination (Addition & Subtraction) Solve by Elimination Example Problems Practice Problems.

3.5 – Solving Systems of Equations in Three Variables.

Algebraic Expressions. Definitions Variable – A variable is a letter or symbol that represents a number (unknown quantity). 8 + n = 12.

Solving by Elimination Example 1: STEP 2: Look for opposite terms. STEP 1: Write both equations in Standard Form to line up like variables. STEP 5: Solve.

7.4. 5x + 2y = 16 5x + 2y = 16 3x – 4y = 20 3x – 4y = 20 In this linear system neither variable can be eliminated by adding the equations. In this linear.

Direct Variation 3.6. Direct Variation  Direct Variation is when two variables can be expressed as y=kx where k is a constant and k is not 0.  k is.

Rational Root Theorem Definitions Steps Examples.

Solving Linear Systems by Substitution

Substituting into expressions.

Evaluating Expressions

SECONDARY ONE 6.1a Using Substitution to Solve a System.

Solving a System of Equations in Two Variables By Substitution Chapter 8.2.

Warm-up. Systems of Equations: Substitution Solving by Substitution 1)Solve one of the equations for a variable. 2)Substitute the expression from step.

SOLVING SYSTEMS OF EQUATIONS BY SUBSTITUTION. #1. SOLVE one equation for the easiest variable a. Isolated variable b. Leading Coefficient of One #2. SUBSTITUTE.

Notes 6.5, Date__________ (Substitution). To solve using Substitution: 1.Solve one equation for one variable (choose the variable with a coefficient of.

Solving a System of 3 Equations with 3 Unknowns. Breakdown Step 1 Labeling Step 2 Reduce to a 2 by 2 Step 3 Substitute Back In Step 4 Check Solution.

6.23 I will model & solve addition equations Solve the problems + 4 = = 12 How did you know the answer?

Solving Systems by Substitution (isolated) Solving Systems by Substitution (not isolated)

Today we will solve equations with two variables. Solve = figure out.

1.4 Solving Equations.

Evaluating Algebraic Expressions.

Equations Quadratic in form factorable equations

Chapter 12 Section 1.

Solving Systems using Substitution

1-5 Equations Goals: Solve equations with one variable

3-2: Solving Systems of Equations using Substitution

6-2 Solving Systems By Using Substitution

Warm-Up Solve the system by substitution..

Solve a system of linear equation in two variables

Introduction to Algebra

Solving Word Problems Objective: Students will be able to write and solve equations based on real world situations.

3-2: Solving Systems of Equations using Substitution

Solving Systems of Equations using Substitution

3-2: Solving Systems of Equations using Substitution

Use Inverse Matrices to Solve 2 Variable Linear Systems

Solve Linear Equations by Elimination

7.2 Solving Systems of Equations Algebraically

Reviewing Chapter 1 (Part 1)

Evaluating Algebraic Expressions

Evaluating Algebraic Expressions.

1.4 Evaluating Algebraic Expressions.

Warm Up 12/3/2018 Solve by substitution.

Warm-Up Solve the system by graphing..

Day 69 Literal equations.

3-2: Solving Systems of Equations using Substitution

Equations Quadratic in form factorable equations

Chapter 8 Systems of Equations

Evaluating Algebraic Expressions.

Do Now Simplify. 1. 5(7) – (18 – 11)  (40 – 35) (12 – 4)

Solving Equations.

3-2: Solving Systems of Equations using Substitution

3-2: Solving Systems of Equations using Substitution

Learn to identify and evaluate expressions.

Evaluating Algebraic Expressions.

Solving systems of equations by substitution

= Today’s Objective To be able to evaluate variable expressions

3-2: Solving Systems of Equations using Substitution

3-2: Solving Systems of Equations using Substitution

Bell Work Combine all the like terms

Algebraic Expressions & Solving Equations

Solving Linear Equations

Presentation transcript:

s  What is a variable?  What does it mean to substitute a number?  Why do we need variables to solve problems in real life?  What does an expression consist of?

 Variable-Variables are letters or other symbols that represent unknown numbers or values.  Constant- is a number on its own  Substitution- putting a number in for a variable.  Expression/equation- a group of terms in the format of this=that.  Solve- to find the answer to.

          What is a variable? What does it mean to substitute a number? Why do we need variables to solve problems in real life? What does an expression consist of?

 Label each part of the equation  X+15=45  3y-20=40  Can you solve the equation X+Y=10?  Why?  Y=5 can you now?

 Name some real life situations in which we might encounter an unknown(variable) number and might need an equation to find it?  Do group investigation.  Hand out Post-Assessment