1. S IMILARITY Day 1: Ratios and Proportions

2. 7.1 F ORMS OF R ATIOS Essential Question: What are the important things to remember when using ratios?

3. Comparison of two quantities by division a:b a to b a b

4. Express same relationship

5. 14:18 SIMPLIFY 7:9 What is the ratio of girls to boys in this class?

7. 3d:2s 3x+2x=30 5x= 30 x=6 3*6 dancers, 2*6 singers 18 dancers, 12 singers

8. TECHNOLOGY BREAK 5min

9. 7.2 P ROPORTIONS P ROPERTIES Essential Question: What is a proportion?

10. equation that states two ratios are equal

12. 4(30)=5x 120=5x 20(y+1)=5(8) 20(y+1)=40 y+1=2 6(x – 2)=5(2x+4) 6x – 12=10x+20 -32=4x 24=x y=19 -8=x

13. x=60 feet 5x=300

14. P LICKER E XIT S LIP Question 1 Simplify the following ratio as much as possible: 2ft:6in A) 2:6 B) 1:3 C) 12:3 D) 4:1 Question 2 The ratio of cats to dogs is 5:2. If the total number is 21, how many of each animal is there? A) 15 cats, 6 dogs B) 6 cats, 15 dogs C) 14 cats, 7 dogs D) 7 cats, 14 dogs

15. H OMEWORK 7.1 odds 7.2 odds Due by Friday