Answer:
There are 32 dimes and 25 quarters. 
Step-by-step explanation:
q + d = 57 or q = 57 - d  
25q + 10d = 945  
substitute first equation into second equation:  
25(57 - d) + 10d = 945  
1425 - 25d + 10d = 945  
-15d = -480  
d = -480/-15 = 32  
using first equation:  
q = 57 - 32 = 25  
check using second equation:  
25(25) + 10(32) = 945 checks 
 
        
             
        
        
        
Answer:
X4,5,6,7,8,9..... Y3456789.... 
 
        
             
        
        
        
The mean is: 7.6
The range is: 7
The median is: 7
The mode is: 5
:)
        
                    
             
        
        
        
Answer:
12.3 mph
Step-by-step explanation:
17.9 - 5.6 = 12.3