1. Agenda Monday – Ratios Tuesday – Ratios Wednesday – Ratios
Thursday – Measurements
Friday – Measurements
– PS17 Due
– PS18 Passed Out

2. 5) 2) 3) 4) 1)
Write an equation and solve.
Write an equation and solve.
Bellwork 2/5
Julio paid $9 for a pizza. He now has $26. How much money did he have before buying the pizza?
The wind blew away 30 of your muffins. That was 5/6 of all of them! How many muffins did you have to start?
Find the mean of the data set.
5, 8, 6, 2, 9, 8, 4, 50
Write an inequality and solve.
Write an inequality and solve.
Find the mean of the data set without the outlier.
The science club charges $4.50 per car at their car wash. Find how many cars they have to wash to earn at least $300.
Determine the maximum number of $0.44 stamps you can buy for $5.00.
5, 8, 6, 2, 9, 8, 4, 50

3. Ratios
Purpose: Today I will be able to use ratios to predict an outcome based on previous data.

4. In Class Ratios

6. How many fish are in the lake?
Discuss coin jar calculator.
Buy two boxes of plain orange goldfish. Two bags of colored. Pass out paper bags. Have them name “their lakes.” Put orange goldfish in the bag. Have them make the fish swim. Drop some colored on their desks. Have them make an equal swap with plain. Then do one sample all the way through. Average the five.

7. How many fish are in the lake?

8. How many fish are in the lake?

9. How many fish are in the lake?

10. How many fish are in the lake?

11. How many fish are in the lake?

12. How many fish are in the lake?

13. A warden captured and tagged 150 fish
A warden captured and tagged 150 fish. A week later he pulled up 20 tagged fish and 40 untagged fish. How many fish are in the lake?

16. There are 22 events at an indoor track and field meet
There are 22 events at an indoor track and field meet. The ratio of track events to field events is 8 : 3. How many of the events are track events?

17. The two triangles are similar, solve for x:
6ft
15 ft
2 ft x

18. In a capture-recapture process, 200 fish were tagged
In a capture-recapture process, 200 fish were tagged. From the recapture results, the game warden estimates that the lake contains 2500 fish. What percent of the fish were tagged.

19. Unit Rate How many calories are in one potato chip?
How many calories from Fat are in each potato chip?
How many calories per gram?