Answer: Brielle will run the marathon faster.
Brielle = 104.8 minutes  
Joshua = 157.2 minutes
Step-by-step explanation:
Speed rate = distance /time
Brielle = 1.25 /10 = 0.125 miles per minute
Joshua = 1.5/18 = 0.083333 =1/12 miles per minute
Since 0.125 (Brielle) > 1/12 (Joshua)
Brielle will run the marathon faster.
To calculate the time that takes each one to run the entire race (13.1 miles)
Time= distance / speed
- Brielle = 13.1 /0.125 = 104.8 minutes
- Joshua = 13.1 / (1/12)= 157.2 minutes
Feel free to ask for more if needed or if you did not understand something.
 
        
             
        
        
        
First add the biggest number like thousand together and the go in to the last numbers
        
                    
             
        
        
        
The answer is 13.76 meters squared.
        
                    
             
        
        
        
Guessing you want to simplify each,
first one goes to just x
second goes to 4x
third goes to 18x-15