Answer:

Step-by-step explanation:
Given the initial ratio of 3 parts water to 5 parts fruit juice, you can set up a proportion (equivalent ratios) to determine the amount of water needed with just 1 part of fruit juice: 

cross multiply: 5x = 3
divide: 5x/5 = 3/5 or x = 3/5 
3/5 = 0.6 parts water 
 
        
                    
             
        
        
        
Answer:
i think its 10
Step-by-step explanation:
4 6 8 10 15 20 21
 
        
             
        
        
        
3x600= 3 x 6 hundreds
= 18 hundreds
<span>= 1,800</span>
        
             
        
        
        
Answer:
Yes, it's an arithmetic sequence.
Step-by-step explanation:
Each term in this sequence is 4 more than the previous term.  Therefore we have an arithmetic sequence.