Answer: 45%
Step-by-step explanation: There's 9 people over the age of 14. And 9 divided by the total number, 20, gives you 0.45. 0.45 multiplied by 100 is 45.
 
        
             
        
        
        
Answer:
23346.5
Step-by-step explanation:
add them together and divide by 2
 
        
             
        
        
        
Answer:
the required value of c is [ -11 -1 
 2 5]
 
        
             
        
        
        
Answer:
 
 
Step-by-step explanation:

(x + 7)° = (15 + 7)° = 22°
(4x + 8)° = (4*15 + 8)° = (60 + 8)° = 68°
 
 
 
        
             
        
        
        
12 cm for the first one and 11.6 for the second.
Unrelated to the question, that house around number 3 gives me nostalgia of elementary school :)