16ft and 25ft sorry if i’m wrong
        
             
        
        
        
3+8x-2y-x+1+4y
Combine all like terms and 
7x+4+2y is your answer
        
             
        
        
        
Answer:
Therefore, x is 1 and 2.
Step-by-step explanation:
As you plot both equations on the same graph, you will get something like this, shown in the graph.
Then, you have to find the x solutions where they intersect.
So, both equations intersect at x = 1 and 2.
 
        
             
        
        
        
Answer:
Approximately 76.5 mg.
Step-by-step explanation:
Given,
The initial quantity of the Bismuth-210, P = 233 mg,
Also, the rate of decay per day, r = 13 %
Thus, the quantity of the Bismuth-210 after 8 days would be,





