Answer:
Brian’s and Kelsey’s cars traveled at the same rate.
Step-by-step explanation:
 
        
             
        
        
        
3x+2y=5.44 
it's a two variable problem which can't be solved algebraically unless you are given the weight of one of the balls.
        
             
        
        
        
Answer:
So I'd say 20in^2 or 22in^2.
Step-by-step explanation:
I decided to make it into a full pentagon shape to just estimate.
So a pentagons sides are all equal so I counted the amount in boxes on the sides of the regular shape and most of them would be 3.5 if you changed the shape into a pentagon. 
And I got:
--> 21.076
 
        
                    
             
        
        
        
I think you forgot to add the other part of the question
        
             
        
        
        
15. 99%, 0.95, 5/9, 9.5%
Make all decimals: .99, .95, .55, .095
List: Zero is less than 9 or 5 so it's first than 5 and than 9, you have two 9's so 5 is less than 9: .095, .55, .95, .99
16. 3/8, 50%, 0.35, 38%
Same steps: .375, .50, .35, .38
3 is less than 5 and 5 is less than 8 or 7 so: .35, .375, .38, .5
And do the same thing for the other two problems :)