1. Solve the equation.
1. x = 25 5 6
ANSWER 30
2. (6x + 3) = 14 2 3
ANSWER 3

2. Solve the equation.
– 7 = 12 g 5
ANSWER 95
4. You buy three identical polyester film balloons and a
birthday card. The card costs $3.95. Find the cost of each balloon if your total bill before tax was $33.80.
ANSWER
$9.95

3. Homework: Page 118 # 41-55 odd Page 124 # 33-33-43 odd

4. EXAMPLE 1
Write a ratio
VOLLEYBALL
A volleyball team plays 14 home matches and 10 away
matches.
a. Find the ratio of home matches to away matches.
b. Find the ratio of home matches to all matches.
SOLUTION = 7 5 a.
home matches
away matches 14 10 b.
home matches
all matches 14 = 24 7 12

5. EXAMPLE 1
Example 2
Derek and his brother decide to combine their CD collections. Derek has 44 CDs, and his brother has 52 CDs. Find the specified ratio.
a. The number of Derek’s CDs to the number of his brother’s CDs. 11 13
ANSWER
b. The number of Derek’s CDs to the number of CDs in the entire collection. 11 24
ANSWER

6. EXAMPLE 2
Example 3
Solve the proportion. Check your solution.
b. 11 6 x 30 = 4 7 w 35 = a.
55 = x 20
ANSWER m 12 9 2 = c. 5 9 z 54 = d. 54
ANSWER 30
ANSWER

7. Example 4
Solve a multi-step problem
ELEVATORS
The elevator that takes passengers from the lobby of the John Hancock Center in Chicago to the observation level travels 150 feet in 5 seconds. The observation level is located on the 94th floor, at 1029 feet above the ground. Find the time it takes the elevator to travel from the lobby to the observation level.
ANSWER
The elevator travels from the lobby to the observation level in 34.3 seconds.

8. Example 5
ASTRONOMY
When two full moons appear in the same month. The second full moon is called a blue moon. On average, 2 blue moons occur every 5 years. Find the number of blue moons that are likely to occur in the next 25 years.
ANSWER
10 blue moons

9. Solve the proportion.
6. It takes 30 tomatillos to make 8 ounces of enchilada
sauce. How many tomatillos does it take to make 12
ounces of enchilada sauce?
ANSWER
45 tomatillos

10. Example 7
Write and solve a proportion
Each day, the seals at an aquarium are each fed 8 pounds of food for every 100 pounds of their body weight. A seal at the aquarium weighs 280 pounds.
How much food should the seal be fed per day?
Seals
ANSWER
A 280 pound seal should be fed 22.4 pounds of food per
day.

11. EXAMPLE 4
Use the scale on a map
GUIDED PRACTICE
Model ships 8.
The ship model kits sold at a hobby store have a scale of 1 ft : 600 ft. A completed model of the Queen Elizabeth II is 1.6 feet long. Estimate the actual length of the Queen Elizabeth II.
ANSWER
about 960 ft

12. EXAMPLE 2
Example 9
Solve the proportion. Check your solution. 3 x = 2
– 6 a. 4 m 5 =
m – 6 b. 18
ANSWER 18
ANSWER

13. Daily Homework Quiz 1.
A chocolate chip cookie recipe calls for
cups of flour and cup of brown sugar. Find
the ratio of brown sugar to flour. 3 4 1 2
ANSWER 1 3
Solve the proportion. 2. a 7 9 21 =
ANSWER 3

14. Daily Homework Quiz
Solve the proportion. 32 28 3. = m 14 16
ANSWER 4.
A printer can print 12 color pages in 3 minutes. How many color pages can the printer print in 9 minutes? Write and solve a proportion to find the answer.
ANSWER 12 3 = x 9
; 36 color pages