1. Lesson 2­8.notebook October 18, 2012
Assignment:
1­­>L2.8, pg. 128­129, #1­21 (odds) ­ Due Monday (10/22)
2­­>Checkpoint 2­5 thru 2­8 ­ Due Monday (10/22)
3­­>Chapter 2 Test ­ Thursday (10/25)
1

2. Lesson 2­8.notebook October 18, 2012
Lesson 2.8 WarmUp:
1) Evaluate |f + g| ­ h, when f = 4, g = ­5, and h = 6
Solve­­then graph the solution set.
2) |2x ­ 4| = 8
3) |5y + 2| = ­7
Solve. If necessary, round to the nearest hundredth.
4) 2n ­ 4 3n + 3
5 10
5) Find the percent of change­­round to the nearest whole percent.
original: 11
new: 25
2

3. Lesson 2­8.notebook October 18, 2012
Lesson 2.8:
*literal equation ­ a formula or equation that involves several "different"
variables
*To solve a literal equation ­ use the same process as solving an equation
with one variable. [Isolate the variable that you are solving for]
*dimensional analysis/unit analysis = unit multiplier
*Used to convert measures
3

4. Lesson 2­8.notebook October 18, 2012
Lesson 2.8 examples:
Solve each equation or formula for the variable indicated.
A) 4m ­ 3n = 8, for m
B) a(q ­ 8) = 23, for q
4

5. Lesson 2­8.notebook October 18, 2012
C) ­14n + q = rt ­ 4n, for n
D) Mrs. Durst found a rare game online priced at 35 Australian dollars.
If the exchange rate is $1 US = $1.24 Australian, find the cost of the game
in US dollars. Round to the nearest cent.
5