1. Splash Screen

2. 1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 2-5) A.4 B. 2 C. –2 D. –4 Evaluate c – b for b = 3 and c = –1. Evaluate 9 – a for a = –2. A.11 B.7 C. –7 D. –11 What is –4 subtracted from –3? A.–7 B. –1 C. 1 D. 7

3. Lesson Menu Main Idea Key Concept: Multiply Integers with Different Signs Key Concept: Multiply Integers with Same Sign Example 6: Use Integers to Solve a Problem Example 7: Evaluate Expressions

4. Main Idea/Vocabulary Multiply integers (2.2.8B) (M8.A.3.3.1).

5. KC 1 1.D

6. Example 6 Use Integers to Solve a Problem MINES A mine elevator descends at a rate of 300 feet per minute. How far below the earth’s surface will the elevator be after 5 minutes? If the elevator descends 300 feet per minute, then after 5 minutes, the elevator will be at –300(5) or –1,500 feet. Thus, the elevator will descend to –1,500 feet. Answer: After five minutes, the elevator will be 1,500 feet below the earth’s surface.

7. 1.A 2.B 3.C 4.D Example 6 A.–$468 B.$468 C.–$84 D.$84 RETIREMENT Mr. Rodriguez has $78 deducted from his pay every month and placed in a savings account for his retirement. What integer represents a change in his savings account for these deductions after six months?

8. Example 7 ALGEBRA Evaluate abc if a = –3, b = 5, and c = –8. Answer: 120 Evaluate Expressions abc=(–3)(5)(–8)Replace a with –3, b with 5, and c with –8. =(–15)(–8)Multiply –3 and 5. =120Multiply –15 and –8.

9. 1.A 2.B 3.C 4.D Example 7 A.–48 B.–4 C.0 D.48 ALGEBRA Evaluate xyz if x = –6, y = –2, and z = 4.

10. Review REVIEW 1.Tamera owns 100 shares of a certain stock. Suppose the price of the stock drops by $3 per share. Write a multiplication expression to find the change in Tamera’s investment. Explain. Evaluate each expression if f = -1, g = 7, and h = -10. 2.5f 3.fgh 100(-3) = -300; Tamera’s investment if now worth $300 less than it was before the stock dropped. 5(-1)=-5 -1(7)(-10)=70

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12. Resources Five-Minute Check (over Lesson 2–5) Image Bank Math Tools Adding Integers Comparing and Ordering Integers Subtracting Positive and Negative Integers

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