Answer:
x = - 8, y = 2
Step-by-step explanation:

 
        
             
        
        
        
I can’t seem to look at the bottom two answers and the two ( A and B) are not correct. So you’re left with either C or D
        
             
        
        
        
Answer:
B. 90 pounds.
Step-by-step explanation:
19 pounds would be too light, 900 pounds would be too heavy, and 9 tons is equal to 18,000 pounds which is wayy too heavy.
Hope this helps!
 
        
             
        
        
        
Answer:
11,880 different ways.
Step-by-step explanation:
We have been given that from a pool of 12 candidates, the offices of president, vice-president, secretary, and treasurer will be filled. We are asked to find the number of ways in which the offices can be filled.
We will use permutations for solve our given problem.
 , where,
, where, 
n = Number of total items,   
r = Items being chosen at a time.         
For our given scenario  and
 and  .
.





Therefore, offices can be filled in 11,880 different ways.