The document is a lesson plan on evaluating expressions from August 18, 2011. It provides examples of evaluating expressions by replacing variables with numbers and using order of operations. It gives practice problems such as finding the cost of ordering CDs from an online music store and the number of energy drink cases a store should order to get a certain number of bottles. It assigns homework of evaluating expressions from page 16, problems 1-14 and the even problems from 20-30.

1. 1.3 Evaluating Expressions August 18, 2011
1. [3(5) + 1] 2 4. [30/(5) + 1] ­ 32
2. 9 + 8 2 + 4 5. 1 + 2
8 4
3. 7 − (3 ∗ 2 +1)
Bellwork
HW pg. 16 #1­14, 20­30 evens 1

2. 1.3 Evaluating Expressions August 18, 2011
HW pg. 16 #1­14, 20­30 evens 2

3. 1.3 Evaluating Expressions August 18, 2011
Evaluate ­ replace each variable with a number.
Then use the order of operations to simplify.
Evaluate 4y ­ 15 for y = 9
HW pg. 16 #1­14, 20­30 evens 3

4. 1.3 Evaluating Expressions August 18, 2011
Evaluate
4(t + 3) + 1, for t = 8
HW pg. 16 #1­14, 20­30 evens 4

5. 1.3 Evaluating Expressions August 18, 2011
Evaluate 3ab + c , a = 2, b = 5, c = 10
2
HW pg. 16 #1­14, 20­30 evens 5

6. 1.3 Evaluating Expressions August 18, 2011
Evaluate
2xy ­ z , x = 4, y = 3, z = 1
r + s , r = 13 and s = 11
2
HW pg. 16 #1­14, 20­30 evens 6

7. 1.3 Evaluating Expressions August 18, 2011
Energy drinks come in cases of 24 bottles.
a. Write a variable expression for the
number of cases a store should order to get
b bottles of energy drinks.
b. Evaluate the expression for 120 bottles.
HW pg. 16 #1­14, 20­30 evens 7

8. 1.3 Evaluating Expressions August 18, 2011
An online music store charges $14 for each CD.
Shipping costs $6 per order.
Write a variable expression for the cost of
ordering CDs.
Find the cost of ordering 4 CDs.
HW pg. 16 #1­14, 20­30 evens 8

9. 1.3 Evaluating Expressions August 18, 2011
HW
pg 16
# 1 ­ 14 all
# 20 ­ 30 even
HW pg. 16 #1­14, 20­30 evens 9