1. Warm-up: September 10, 2014
What is the difference between algebraic and numerical expressions?
Write algebraic expressions for the following and then evaluate the expression when x = 12
Verbal
Algebraic
x = 12
x reduced by 5
x - 5
12 – 5 = 7
7 more than x
The quotient of x and 2
The sum of x and 3

2. Warm-up: September 10, 2014
What is the difference between algebraic and numerical expressions?
Write algebraic expressions for the following and then evaluate the expression when x = 12
Verbal
Algebraic
x = 12
x reduced by 5
x - 5
12 – 5 = 7
7 more than x
x + 7
= 19
The quotient of x and 2
x/2
12 / 2 = 6
The sum of x and 3
x + 3
= 15

3. Homework: page 43 #24-32
-17 19 47
-15
-10 3 15 -5 -6

4. Homework: page 9 #18-30e
4 minus y or 4 less than y or 4 decreased by y
3 times y or 3 multiplied by y
r divided by 5 or the quotient of r and 5
x plus 0.5 or 0.5 added to x or x greater than 0.5 8n 8 30

5. TONIGHT’S HOMEWORK Section 1.1, pages 9-10 Section 1.7, pages 47-48
31, 38, 42
Section 1.7, pages 47-48
Define Like Terms and Coefficient
Section 1.7, page 49
2-24e

6. Algebraic Expressions
Holt Algebra I – 1.1
Algebraic Expressions

7. Story Problems into Algebraic Expressions
Eve reads 25 pages per hour. How many pages does she read in h hours?

8. Story Problems into Algebraic Expressions
Eve reads 25 pages per hour. How many pages does she read in h hours?
25h

9. Story Problems into Algebraic Expressions
Eve reads 25 pages per hour. How many pages does she read in h hours?
25h
Sam is two years younger than Sue. How old is Sam if Sue is y years old?

10. Story Problems into Algebraic Expressions
Eve reads 25 pages per hour. How many pages does she read in h hours?
25h
Sam is two years younger than Sue. How old is Sam if Sue is y years old?
y - 2

11. Example 4 – Page 8
Approximately fourteen 20-ounce plastic bottles must be recycled to produce 1 square foot of carpet.
Write an expression that represents how many bottles it takes to produce c square feet of carpet.
Evaluate the expression to find the number of bottles needed to make 40, 120, and 224 square feet of carpet.

12. Example 4 – Page 8 14 x c or 14c Use 14c to evaluate the question c40
14(40)=560 Bottles
120
14(120)=1680 Bottles
224
14(224)=3136 Bottles

13. Chapter Properties

14. The Commutative Property
You can add or multiply numbers in any order. It will not change the final value
Numerical
Algebraic
2 + 7 = 7 + 2
3 x 9 = 9 x 3
a + b = b + a
a x b = b x a

15. The Associative Property
Only when you are adding or multiplying, you can group any of the numbers together.
Numerical
Algebraic
= (6 + 8) + 2
= 6 + (8 + 2)
7 x 4 x 5
= (7 x 4)5
= 7(4 x 5)
a + b +c
= (a + b) + c
= a + (b + c)
abc
= (ab)c
= a(bc)

16. The Distributive Property
You can multiply a number by a sum or multiply by each number in the sum and then add. The result is the same.
Numerical
Algebraic
3(4 + 8) = 3(4) + 3(8)
a(b + c) = a(b) + a(c)

17. Homework Section 1.1, pages 9-10 Section 1.7, pages 47-48
31, 38, 42
Section 1.7, pages 47-48
Define Like Terms and Coefficient
Section 1.7, page 49
2-24e