1. Splash Screen

2. Lesson Menu Five-Minute Check (over Lesson 2–8) Main Idea and Vocabulary Example 1:Write Expressions Using Powers Example 2:Write Expressions Using Powers Key Concept: Zero and Negative Exponents Example 3:Evaluate Powers Example 4:Evaluate Powers Example 5:Evaluate Powers

3. Main Idea/Vocabulary power base exponent Use powers and exponents in expressions.

4. Example 1 Write Expressions Using Powers Associative Property Answer: Definition of exponents

5. 1.A 2.B 3.C 4.D Example 1 A.2 3 ● 5 3 B.2 4 ● 5 3 C.(2 ● 5) 4 D.(2 ● 5) 7 Write 2 ● 2 ● 2 ● 2 ● 5 ● 5 ● 5 using exponents.

6. Example 2 Write Expressions Using Powers Write p ● p ● p ● q ● p ● q ● q using exponents. p ● p ● p ● q ● p ● q ● q = p ● p ● p ● p ● q ● q ● qCommutative Property = (p ● p ● p ● p) ● (q ● q ● q)Associative Property Answer: p 4 ● q 3 = p 4 ● q 3 Definition of exponents

7. 1.A 2.B 3.C 4.D Example 2 A.x 3 ● y 4 B.x 4 ● y 3 C.x 3 ● y 7 D.(x ● y) 7 Write x ● y ● x ● x ● y ● y ● y using exponents.

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9. Example 3 Evaluate Powers Answer: Write the power as a product. Multiply.

10. 1.A 2.B 3.C 4.D Example 3 A. B. C. D.

11. Example 4 Evaluate 3 –7. Evaluate Powers Answer: Write the power using a positive exponent. Simplify.

12. 1.A 2.B 3.C 4.D Example 4 Evaluate 2 –5. A. B. C. D.

13. Example 5 ALGEBRA Evaluate x 3 ● y 5 if x = 4 and y = 2. x 3 ● y 5 = 4 3 ● 2 5 Replace x with 4 and y with 2. Answer: 2,048 Evaluate Powers = (4 ● 4 ● 4) ● (2 ● 2 ● 2 ● 2 ● 2) Write the powers as products. = 64 ● 32Simplify. = 2,048Simplify.

14. 1.A 2.B 3.C 4.D Example 5 A.576 B.1,846 C.2,304 D.3,112 ALGEBRA Evaluate x 2 ● y 4 if x = 3 and y = 4.

15. End of the Lesson

16. Resources Five-Minute Check (over Lesson 2–8) Image Bank Math Tools Multiplying Fractions Multiplying and Dividing Fractions

17. 1.A 2.B 3.C 4.D Five Minute Check 1 A.25 seats B.31 seats C.37 seats D.43 seats In a stadium there are 10 seats in the 1 st row, 13 seats in the 2 nd row, 16 seats in the 3 rd row, and so on. How many seats are in the 10 th row? (over Lesson 2-8)

18. 1.A 2.B 3.C 4.D Five Minute Check 2 Find the next three numbers in the sequence 20, 24, 21, 25, 22, 26... (over Lesson 2-8) A.28, 32, 29 B.23, 27, 24 C.30, 27, 31 D.24, 28, 25

19. 1.A 2.B 3.C 4.D Five Minute Check 3 A.24 B.28 C.30 D.32 Sarah rents videos from a video rental store that charges a monthly rate of $9.95 plus $0.75 per video rental. If Sarah’s total monthly bill was $30.95, how many videos did she rent? (over Lesson 2-8)

20. 1.A 2.B 3.C 4.D Five Minute Check 4 A.130 miles B.162.5 miles C.195 miles D.227.5 miles (over Lesson 2-8) The Ito family is driving to Oklahoma City from Houston. If they average 65 miles per hour, how far will they drive in hours?

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