1. Write an equation in slope-intercept form.
Bell Ringer
Write an equation in slope-intercept form.
1. 6x + y = y – 4x = 7
3. y + 3 = 15x y = 20x

2. Section 9.1 Powers and Exponents
R drive > Key > Jan 26_30 > 1_26__9.1 Powers and Exponents File > Save As > P drive > Math > Jan 26_30 > 1_26__9.1 Powers and Exponents

3. Vocabulary
Make sure you start a new section in your vocabulary since this will be for a new unit. Exponent – Tells how many times a number is used as a factor Power – A number that is expressed using an exponent Base – The number that is multiplied

4. Notes
We use exponents to tell us how many times a number is used as a factor. Instead of 5 x 5 x 5, we write:

5. Notes
How to read and write powers:

6. Notes

7. Example 1 Write Expressions using Exponents

8. Example 2 Write Expressions using Exponents
Write each expression using exponents.

9. Example 3 – Your Turn Write Expressions using Exponents
Write each expression using exponents x 9 x 9 x 9 2. (-1)(-1)

10. Example 4 Write Expressions using Exponents

11. Notes <<<BEWARE>>>

12. Example 5 Write Expressions using Exponents

13. Example 6 – Your Turn Write Expressions using Exponents
Write each expression using exponents.
w · w · w · w · w
(5x + 1)(5x + 1)
½ · x · x · x · x · y · y· y

14. Notes

15. Example 7 Evaluate Expressions

16. Example 8 Evaluate Expressions

17. Example 9 – Your Turn Evaluate Expressions
North American hockey rinks are built according to National Hockey League specifications. Evaluate each expression to find these dimensions.
The distance from the goal line to the closest blue line is 26 feet.
The length of the rink is 23 · 52 feet.

18. Example 10 Evaluate Algebraic Expressions

19. Example 11 Evaluate Algebraic Expressions

20. Example 12 – Your Turn Evaluate Algebraic Expressions
Evaluate x2 – y3 if x = -5 and y = 2

21. Homework Section 9.1 #

22. Homework Section 9.1 #