Answer:
length;12cm
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
B and C
Step-by-step explanation:
To figure out the average of all of the scores, you add all of the numbers together and then divide by how many numbers there are. The average shows about how well they did. Anne's friends average was 90 and was higher than Joan's friends average which was 75. Then the lowest score was definitely 78. So the answer would be B and C. 
 
        
             
        
        
        
<span>25 1/2 + 18 1/5
=</span><span>25 5/10 + 18 2/10
=43 7/10</span>
        
                    
             
        
        
        
Answer:
The first one is linear, the second one is not linear, and the third one is linear.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
18/5
Step-by-step explanation: