The old mean was 51 now the mean is 42.33... (round that to 42) 51 - 42 = 9
        
             
        
        
        
Answer:
x = -5/2
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: In attached 
Step-by-step explanation:
Use the given functions to set up and simplify 
Attachment has your answer. 
I’m not good at typing functions on this app so this image is all I could give.
 
        
                    
             
        
        
        
Answer:
The cost of dinner alone was $37.145
Step-by-step explanation:
15%=0.15----Convert your percentage into a decimal 
43.70*0.15=6.555----Multiply the cost of dinner with the decimal
$43.70-$6.555=$37.145----Subtract the last number(6.555) from the total(43.70) to get the cost of dinner alone of $37.145 -This is making you subtract the percentage from the total!
I hope this helped!
 
        
             
        
        
        
Answer:
*gives help*
:)
Step-by-step explanation: