Answer:
x=8
Step-by-step explanation:
7+5x
so basically what you have to do is take the 7 and subtract from both sides 
so like this: 7-7 is 0 so that cancels then 47-7 is 40
then you take 5x and divide 40 by 5
so x=8
hope this helped!
 
        
             
        
        
        
Answer:
The standard error of the mean is 4.5.
Step-by-step explanation:
As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.
The mean of the sample is: 

The standard deviation of the sample is calculated as:

Then, we can calculate the standard error of the mean as:

 
        
             
        
        
        
450,500 because 120,000 and 330,000 and 500 thats the answer
        
             
        
        
        
Answer:
if its answer for x its
Step-by-step explanation:
=4
=8
 
        
                    
             
        
        
        
Answer:
A. SAS B. SSS C. AAS D. ASA
Step-by-step explanation:
A: Line segments AE and EB are congruent and line segments CE and ED are also congruent. The Angles in between line segments AE and EB and line segments CE and ED are congruent to each other
B: Line segments QT and TS are congruent. Line segments QR and RS are congruent. Both triangles share line segment TR
C: Angles A and B are congruent. Angles D1 and D2 are congruent. Line segment CD is shared between both triangles.
D: Angles C1 and C2 are congruent. Angles B1 and B2 are congruent. Line segment CB is shared between the two triangles.