I run 1 mile every 6 minutes.
My friend runs 1 mile every 7 minutes.
Lowest Common Multiple:  LCM ( 6, 7 ) = 42 minutes.
Me : 42 : 6 = 7 miles
My friend : 42 : 7 = 6 miles. 
        
                    
             
        
        
        
Sales increased 50% last year, from $5,000 to $10,000. When sales dropped from $10,000 to $5,000 this year, sales decreased 50%
 
        
             
        
        
        
i dunooo i dont even nooooo
 
        
             
        
        
        
Answer:
(A)74
Explanation:
Let her average score on the last two tests = x.
The six scores will now be: 82,78,87,73, x and x.
Since the average score for her first six chemistry tests = 78

We then solve for x.

Her average score for the last two tests is 74.
 
        
             
        
        
        
One is significantly fatter than the other and has more friction