1. lesson 39.notebook December 17, 2012
Assignment:
1­­>Set 39 (all) ­ Due Wednesday (12/19)
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2. lesson 39.notebook December 17, 2012
Lesson 39 Warm­Up:
1) Convert 5 minutes 52 seconds into seconds
2) The ratio of walkers to joggers at the track was 3 to 7.
What fraction of the athletes were walkers?
3) Reduce: 720
1080
4) Round 3184.5641 to 2 decimal places.
5) Write 2% as a reduced fraction.
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3. lesson 39.notebook December 17, 2012
Lesson 39:
*A proportion is a statement that 2 ratios are equal.
*We can use "McDonald's Arches" to find
missing parts of a proportion!!
4 6
=
8 12
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4. lesson 39.notebook December 17, 2012
Examples (Lesson 39):
Solve each proportion.
A) a 6
12 8
B) 30 20
b 16
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5. lesson 39.notebook December 17, 2012
C) 14 c
21 15
D) 30 2.4
25 d
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6. lesson 39.notebook December 17, 2012
E) 30 n
100 40
F) m 9
100 12
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