Answer: x^2, x<2, 5, 2</=x<4
Step-by-step explanation:
 
        
             
        
        
        
The value of x in the expression, x 2 = 9 is 4.5
9 divided by 2 = 4.5
        
             
        
        
        
Answer:
It is 3
Step-by-step explanation:
 
        
                    
             
        
        
        
Sound travels 10200m farther through stone in 17 seconds than through aluminium
Speed of sound in aluminium =  3100 m/s
The speed of sound in stone = 3700 m/s
Time taken = 17 minutes
Distance traveled = Speed  x  Time
Distance traveled by sound in aluminium in 17 seconds  = 3100    x  17
Distance traveled by sound in aluminium in 17 seconds  = 52700 m
Distance traveled by sound in stone in 17 seconds =  3700   x  17
Distance traveled by sound in stone in 17 seconds =  62900 m
Difference in the distance traveled = 62900 - 52700
Difference in the distance traveled = 10200 m
Sound travels 10200m farther through stone in 17 seconds than through aluminium
Learn more here: brainly.com/question/13096122
 
        
             
        
        
        
Answer:
The number is  
Step-by-step explanation:
From the question we are told that  
       The sample size is  n =  800 
        The number of seniors is  S  =  519 
          The number of  commuters is  C =  430 
          The number of of seniors that are commuters is   
 
 Generally the number of 800 surveyed students who were seniors or were commuters is  mathematically evaluated as 
      
=>   
=>   