Answer:
5x+3>4x+7
-4x      -4x
x+3>7
-3     -3
x>4
so the answer will be the second 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
 
    
 
    
For this case the confidence interval is given by :

Step-by-step explanation:
Data provided
 represent the sample mean for the fuel efficiencies
 represent the sample mean for the fuel efficiencies
 population mean
 population mean 
s=2.51 represent the sample standard deviation
n=601 represent the sample size  
Confidence interval
The formula for the confidence interval of the true mean is given by:
 (1)
   (1)
The degrees of freedom for this case is given by:
 
The Confidence level for this case is 0.95 or 95%, and the significance level  and
 and  and the critical value is given by
 and the critical value is given by  
Replcing into the formula for the confidence interval is given by:
 
    
 
    
For this case the confidence interval is given by :

 
        
             
        
        
        
Answer
Brandon 
Step-by-step explanation:
Brandon solved three a minute while Marcus solved two a minute
 
        
             
        
        
        
Adam got the sum of his grades right, but he divided that correct figure by 6, getting 84 Before that division, the sum of his grades must have been 84 * 6, or 504. He should have divided 504 by 7, getting 72. Answer: His correct average test score is 72.