(Check Off Completed/ Corrected Items) Pg. 2-3: MSA 3.2 Exploring Equality. Pg. 5-7: MSA 3.3 Writing Equations. Layered Book Exit Ticket 2
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1 Moving Straight Ahead: Linear Relationships Name: Per: Investigation 3: Solving Equations 7.EE.B.4: Use variables to represent quantities in the real world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities. Date Learning Target/s Classwork Mon, Feb. 1 Find the rate of change and write equations for linear relationships. (Check Off Completed/ Corrected Items) Homework (Check Off Completed/ Corrected Items) Check Up 1 Zaption: MSA 3.2 Coins and Pouches Self-Assess Your Understanding of the Learning Target/s Tues, Feb. 2 Weds, Feb. 3 Solve visual equations with one variable. Write and solve symbolic equations with one variable. Pg. 2-3: MSA 3.2 Exploring Equality Pg. 5-7: MSA 3.3 Writing Equations Complete/Correct Classwork Pg. 4: Zaption: MSA 3.2 Practice Complete/Correct Classwork Pg. 8: Puzzles Thurs, Feb. 4 Write and solve symbolic equations with one variable. Layered Book Exit Ticket 2 Complete/Correct Classwork Pg. 9: Puzzles Fri, Feb. 5 Mon, Feb. 8 Solve symbolic equations with one variable. Solve symbolic equations with one variable. Pg : MSA 3.4 Solving Equations Pg : Puzzles Challenge: Pg. 16 (Optional) Complete/Correct Classwork Pg. 13: Zaption: MSA 3.4 Practice Complete Packet (All Pages) Packet Signature Check Up 1 Determine if a table represents a linear function. / 3 Find the rate of change in a graph. / 3 Determine the rate of change from an equation. / 2 Make a table, graph, and equation for a linear relationship and solve for a missing value. / 4 Exit Ticket 2 Write and solve equations with one variable. / Parent/Guardian Signature: Due: 1
2 MSA 3.2: Mystery Pouches in the Kingdom of Montarek Exploring Equality In the Kingdom of Montarek, money takes the form of $1 gold coins called rubas. Messengers carry money between the king s castles in sealed pouches that always hold equal numbers of coins. One day a messenger arrived at one of the castles with a box containing two sealed pouches and five loose $1 coins. The ruler thanks the messenger for the money, which equaled $11. Does the following visual equation help in finding the number of coins in each pouch? Visual Equation Remember: 1. Each pouch contains the same number of $1 gold coins. The total number of coins on each side of the equation is the same. Find the number of gold coins in each pouch. Write down your steps so that someone else could follow your steps to find the number of coins in a pouch. Describe how you can check your answer. That is, how do you know you have found the correct number of gold coins in each pouch?
3 Challenge: In Visual Equation 2, Nichole thought of the left-hand side of the situation as having two groups. Each group contained one pouch and two coins. She visualized the following steps to help her find the number of coins in a pouch. Is Nichole correct? Explain. Noah looked at Nichole s strategy and claimed that she was applying the Distributive Property. Is Noah s claim correct? Explain. Are there other situations in which Nichole s method might work? Explain. 3
4 Zaption for MSA 3.2: Complete and correct with Zaption. Visual Equation Remember: 1. Each pouch contains the same number of $1 gold coins. The total number of coins on each side of the equation is the same. Find the number of gold coins in each pouch. Write down your steps so that someone else could follow your steps to find the number of coins in a pouch. Describe how you can check your answer. That is, how do you know you have found the correct number of gold coins in each pouch?
5 MSA 3.3: Writing Equations The picture shows a situation from Problem 3.2. Because the number of gold coins in each pouch is unknown, you can let x represent the number of coins in one pouch. You can let 1 represent the value of one gold coin. You can write the following equation to represent the situation: 2x + 4 = 12 Or, you can use Nichole s method from Problem 3.2 to write this equation: 2(x+2) = 12 The expressions 2x + 4 and 2(x +2) are expressions. Two or more expressions are equivalent if they have the same value, regardless of what number is substituted for the variable. These two expressions are an example of the Distributive Property for numbers. 2(x+2) = 2x +4 In this problem, you will revisit situations with pouches and coins, but you will use symbolic equations to represent your solution process. Visual Equation 1. Description of Steps for Finding the Coins in Each Pouch Symbolic Equation Use x to represent the number of gold coins in each pouch Use the number 1 to represent each coin Remember the Balance Check 2. 5
6 3. 4. Visual Equation Each x represents a pouch Each 1 represents a coin Description of Steps for Finding the Coins in Each Pouch Symbolic Equation 3x = 12 Remember the Balance Check 2x + 5 = 19 6
7 4x + 5 = 2x + 19 x + 12 = 2x + 6 3(x + 4) = 18 Challenge: Find the Mystery Number a. If you add 15 to 3 times the mystery number, you get 78. What is the mystery number? b. If you subtract 27 from 5 times the mystery number, you get 83. What is the mystery number? c. Make up clues for a riddle whose mystery number is 9. 7
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10 MSA 3.4: Solving Equations To maintain the equality of two expressions, you can add, subtract, multiply or divide each side of the equality by the same number. These are called the properties of equality. In the last problem, you applied properties of equality and numbers to find a solution to an equation. So far in the Investigation, all of the situations have involved positive whole numbers. What strategies do you have for solving an equation like -2x + 10 = 15? 1. For each problem, record each step you take to find your solution and then check your answer. 5x + 10 = 20 5x 10 = 20 5x + 10 = -20 5x 10 = -20 Balance Check Balance Check Balance Check Balance Check 10 5x = x = -20 How do you solve a symbolic equation? Balance Check Balance Check How do you check to make sure your equation is balanced? 10
11 2. For each problem, record each step you take to find your solution and then check your answer. ¼ x + 6 = 12 1 ½ + 2x = 6 ½ 3/5 = -x x = x Balance Check Balance Check Balance Check Balance Check 15 4x = 10x (x + 1) = (x + 1) = 6x -2(2x 3) = -2 Balance Check Balance Check Balance Check Balance Check 11
12 3. Below are examples of students solutions to the equations from question 3. Is each solution correct? If not, explain what the error is. Challenge: Solve each equation for x. Show all steps and check your answer. 12
13 MSA 3.4 Complete and correct with Zaption 1. Solve each equation. Check your answers. 2x + 6 = 6x + 2 2x 6 = -6x + 2 2x + 6 = 6x 2-2x 6 = -6x 2 Balance Check: Balance Check: Balance Check: Balance Check: 2. Solve each equation. Check your answers. (Remember to use the Distributive Property) 3(x+2) = 12 3(x+2) = x 18 3(x+2) = 2x Challenge: 5 2(x-1) = 12 Balance Check: Balance Check: Balance Check: Balance Check: 13
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