4n+7−(7n−8)
=4n+7+−1(7n−8)
=4n+7+−1(7n)+(−1)(−8)
=4n+7+−7n+8
Combine Like Terms
=4n+7+−7n+8
=(4n+−7n)+(7+8)
=−3n+15
        
             
        
        
        
Huh??? Where is the question?
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Given

 --- domain
 --- domain
Required
Determine the range
To do this, we simply substitute the values of n in the given expression
So, we have:






Hence, the range is:

 
        
             
        
        
        
Arc Length is 1/4th of the circumference .
<u>Step-by-step explanation:</u>
Here we need to find fraction of the circumference is this arc when An arc subtends a central angle measuring  radians ! Let's find out :
 radians ! Let's find out :
We know that circumference of an arc subtending a central angle of x is :
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Therefore , Arc Length is 1/4th of the circumference .