Module 3 Lesson 8.notebook

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AIM:Using If-Then moves in Solving

Equations

1/15/14Module 3, Lesson 8

HW: Lesson 8 Problem Set#6, 7, 11

Do Now:

Exit Ticket For Lesson 7 #1

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Homework Answers

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Homework Answers

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Homework Answers

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Opening Exercise:Recall and summarize the if-then moves.

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Julia, Keller and Israel are volunteer firefighters. On Saturday the volunteer fire department held its annual coin drop fundraiser at a streetlight. After one hour, Keller had collected $42.50 more than Julia, and Israel had collected $15 less than Keller. Altogether, the three firefighters collected $125.95. How much did each person collect?

Find the solution using a tape diagram.

What were the operations we used to get our answer?

Julia

Keller

Israel

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The amount of money Julia collected is j dollars. Write an expression to represent the amount of money Keller collected in dollars.

Using the expressions for Julia and Keller, write an expression to represent the amount of money Israel collected in dollars.

Using the expression written above, write an equation in terms of j that can be used to find the amount each person collected.

Solve the equation written above to determine the amount of money each person collected and describe any if-then move used.

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Discussion:How does the tape diagram translate into the initial equation?

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Example 2You are designing a rectangular pet pen for you new baby puppy. You have 30 feet of fence barrier. On a whim, you decide that you would like the length to be feet longer than the width.

Draw and label a diagram to represent the pet pen. Write an expression to represent the width and length of the pet pen.

Find the dimensions of the pet pen.

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Closing:How do you create an equation from a word problem?

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