Answer:
4
Step-by-step explanation:
7x = x² - 8
=> x² - 7x - 8 = 0 
use quadratic formula:
a = 1, b = -7, c = -8
x =  <em>(pls ignore the "A" I don't know why it's showing up)</em>
 <em>(pls ignore the "A" I don't know why it's showing up)</em>
=> x =  
 
=> x = 
=> x =  = 4 or
 = 4 or  = -5 <em>(the answer is only 4 since it's asking for the positive solution)</em>
 = -5 <em>(the answer is only 4 since it's asking for the positive solution)</em>
 
        
                    
             
        
        
        
Now Steve, you can tap these into your calculator one by one,
get all the quotients, and mark the ones that are 4.2, all in about
3 minutes.
There are three (3) of them in the list.
One of them is 'C'.          27.3  ÷  6.5  =  4.2
Now pick up your calculator and find the other two.  You can do it !
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
487 is a prime, because 487 is only divided by 1 or by itself
 
        
             
        
        
        
The answer is 25.83333333
Hope this helps!