Answer:
10x+15
Step-by-step explanation:
5 x 2x=10x
5x3=15
 
        
                    
             
        
        
        
Don't look at this comment.. I messed up the first time so, yeah.
        
             
        
        
        
Answer:
here the line A and H are parallel
 
        
             
        
        
        
You use division
over 2 or 4 or 3 or 5 or 7 and so on
in this case 2 is good
64 = 2 * 2 * 2 * 2 * 2 * 2 ( use division) = 2^6
16 = 2 * 2 * 2 * 2 = 2^4
number reminder
64 0
32 0
16 0
8    0
4   0
2   0
1   1
so 64 = 2^6 (number of zeros) no reminder
        
             
        
        
        
Answer: 17,094 feet
Step-by-step explanation: 
5280 ft. in 1 mile
5280 x 3= 15,840
15,840+1,254= 17,094 ft.