Answer:
1. 22
2.73
3.15
Step-by-step explanation:
 
        
             
        
        
        
Here, v - w would be (6-1, 3-[-2]), or (5, 5).  
I don't believe you need the word "result" here.  At first I thought you'd meant "resultant."  Here you're finding the "difference" v less w.
        
             
        
        
        
.10x + .05y = 4.50
x + y = 30
Is the formula
        
             
        
        
        
The domain is all input values(otherwise known as all x-values on the x-axis) and the range is all possible output values( y-values, as shown on the y-axis). Functions are expressions involving 1 or more variables, in a function x-values are only allowed 1 y-value or else it isn’t considered a function. 
Hope this helps!
        
             
        
        
        
Answer:
I'd say D) a worried young man