Ok, so since she spent $15 each week for 10 weeks, she spent a total of $150 over those 10 weeks. The best approach I would use for this is cross multiplication. The total percentage of Books and music would be 35% out of 100% because 10+25=35. The answer is b, 50. 
Hope this helps :)
        
             
        
        
        
HELLO! HOPE YOURE HAVING A GREAT DAY
your answer is C!
 
        
             
        
        
        
C. point K is (3,-3) and the dilation moves from 3 to 1 so you divide both X and Y coordinates by 3 to get (1,-1)
hope this helps.
        
                    
             
        
        
        
Answer:
197
Step-by-step explanation:
Divide 1640 by 25 
1640/25=65
Then multiply 65 and 3
65x3=197
 
        
                    
             
        
        
        
Answer:
A, B, D
Step-by-step explanation:
The points that lie in the overlapped area (purple), or on the blue line, are solutions to the system. 
Hope that helps! :D