Answer: X= 57/4   Y= 31/4
Step-by-step explanation: I assumed and used substitution from the two equations you provided to find the answer. Hope this helped! :)
 
        
             
        
        
        
The answer to this question is C because all the other answers have a variable which will always have an answer beside it
        
                    
             
        
        
        
Answer:
4x/117
Step-by-step explanation:
 
        
             
        
        
        
The general expression would be:

In an organism that is 20,000 years old (t = 20000), we would expect:

This menas there would be around 8.898% of carbon-14 remaining in the organism.