Answer:5) c= 25.12 cm
6) c= 282.6 m
7) c= 13.188 mi
8) c= 6.28 cm
Step-by-step explanation:
C= 2 x pi x r
Circumference = 2 x 3.14 x radius ( radius is half the diameter of the circle)
 
        
             
        
        
        
The answer is 2. I hope this helped.
        
             
        
        
        
Answer:
x≤-8
Step-by-step explanation:
 
        
             
        
        
        
Hello!
Let 'a' stand for adult tickets and 'c' for children tickets. 
a + c = 15 
(Both adult and children tickets make up a total of 15 tickets). 
30a + 20c = 330
a = 3
c = 12
A N S W E R: 
William bought 3 adults tickets and 12 children's tickets.