Answer:
19.1628873772
Step-by-step explanation:
50.70500 ÷ 2.64600 = 19.1628873772
The answer is b.6, you set up a proportion of the corresponding sides in both triangles...12/9=8/x solve for x and get 6.
7 girls participated only in Karate.
21 + 8 = 29
29 + 7 = 36
36 + 6 = 43