We have 4(x^2 - 2x + 4) - 7 = 4x^2 - 8x + 16 - 7 = 4x^2 - 8x + 9;
So, 4x^2 - 8x + 9 = <span>ax^2+bx+c
;
The value of b is -8.</span> 
        
             
        
        
        
Answer:i think its the first one
Step-by-step explanation:
Nothing else makes sense
 
        
                    
             
        
        
        
Answer:
 
    
E. -0.723
 
  
 
  
Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm. 
Step-by-step explanation:
Information provided
 represent the sample mean for the length
 represent the sample mean for the length
 represent the sample standard deviation
 represent the sample standard deviation
 sample size
 sample size  
 represent the value that we want to test
 represent the value that we want to test
 represent the significance level
 represent the significance level
t would represent the statistic  
 represent the p value for the test
 represent the p value for the test 
System of hypothesis
We need to conduct a hypothesis in order to check if the lathe is in perfect adjustment (6cm), then the system of hypothesis would be:  
Null hypothesis: 
  
Alternative hypothesis: 
  
since we don't know the population deviation the statistic is:
 (1)
  (1)  
Replacing in formula (1) we got:
 
    
E. -0.723
P value
The degrees of freedom are given by:
 
  
Since is a two tailed test the p value would be:  
 
  
Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm. 
 
        
             
        
        
        
The numbers can be 31, 37, 41, 47, 53, and 59.Hope this helps
        
                    
             
        
        
        
Answer:
±10
Step-by-step explanation:
sqrt(-4) * sqrt(-25).
We know that the sqrt(a) sqrt(b) = sqrt(ab)
sqrt(-4*-25)
sqrt(100)
±10