Answer: 5
Work Shown:
f(x) = 2x+1
f(2) = 2*2+1 ... x has been replaced with 2
f(2) = 4+1
f(2) = 5
The input is x = 2. The output is y = 5. 
        
             
        
        
        
Answer:
Step-by-step explanation:
u/4 + 9.9 = 16.9
Putting value of u = 24 in the equation 
24/4 + 9.9 = 16.9
6 + 9.9 = 16.9
15.9 = 16.9
Bringing like terms on one 
16.9 - 15.9 = 1
 
        
                    
             
        
        
        
The percentage change is 20
 
        
                    
             
        
        
        
Given:
Capacity of jet plane = 200,000 liters of fuel
Fuel used during flight = 130,000 liters
To find:
The percentage of the fuel capacity it uses on this flight.
Solution:
According to the question, we need to find 130,000 is what percent of 200,000.



Therefore, the jet plane uses 65 percent of fuel capacity during flight.
 
        
             
        
        
        
Answer:
45+10x = y
Step-by-step explanation:
$45 -- stays the same no matter what so that's constant. 
$10 -- this varies dependent on the number of vaccinations your dog needs, so you'd use a variable to represent the number of vaccinations (in this case I'm using variable "x"). 
So, for example if your dog needed 7 vaccinations, it would be: 45+10(7) = y -- answer being $115.