Answer:
according to me 1st option seems to be correct❤️
 
        
             
        
        
        
Let's say Jackson's age now is x.
In 20 years, (so 20+x), Jackson seven years ago will be 2/5ths of that age.
So 2/5(20+x)=x-7
Then you solve the equation
8+2/5x=x-7
15=3/5x
x=25
Jackson is 25 years old. 
Let's check our answer! In 20 years, Jackson will be 45. 7 years ago, he was 18. 2/5 of 45 is 18. Our answer is correct!
        
                    
             
        
        
        
Answer:
f(x)=2000-8x
Step-by-step explanation:
2000 is initial amount that gets subtracted
8x is the amount of gallons being siphoned out, where x is t, or minutes.
 
        
             
        
        
        
Answer:
Right skewed Histogram.
Explanation:
As the peak of the graph lies to the left side of the centre.
 
        
             
        
        
        
Answer:
-20
Step-by-step explanation:
Do the math in the parenthesis first 
(5-21) = -16
(3+1) = 4
Rewrite the problem
- 16 - 4= -20
The answer is -20