The answer is 64!!
Hope this helps!
        
                    
             
        
        
        
Answer:1. 20
2.27
Step-by-step explanation:
1.  20* 3 = 60
2.27* 3 = 81
 
        
             
        
        
        
Answer:
The sum of ages of all 18 pupils in the class = 81
Step-by-step explanation:
Total number of pupil in the class =  18
Average of years in the class = 
Now, 
⇒Average of sum of ages  in the class = 4.05
Let us assume the sum of ages of all students in the class = m
By the formula for AVERAGE:


or, m =  18 x 4.5 = 81
Hence, the sum of ages of all 18 pupils in the class = 81
 
        
                    
             
        
        
        
for number 7 on the paper is 450 over 300 and answer is 750 over 1 thats how the teachers tought me. 
 
        
             
        
        
        
The answer is choice B 70 square units. There is 7 which is the length and 10 which is the width so you multiply 7 × 10 = 70 Square units that is the final answer.