Answer: 30, 39, 48, 57, 65, 75 84, is your answer!!!.......................
Step-by-step explanation:just add 9 each time 
 
        
             
        
        
        
So, youd start by adding the two sales together to get total sales. Then you would divide that number by the gas sales to get the percent 
65560+36740 = x 
36740/ x = the percentage :)
        
             
        
        
        
Well if you're wanting to use substitution, you first have to end up with one term on either side of the equation. Use the second one as it's easiest. 
So: x-2y=11, so find -2y as there is a -2y in the first equation. 
then that becomes -2y=11-x. then sub that into equation 1, and you get:
-x+11-x=-13, which equals to -2x+11=-13, which is -2x=-24, so therefore
x=12. then chuck the x into any of the equations to find what y equals. 
hope this helps!
        
             
        
        
        
Answer:
20 trail markers
Step-by-step explanation: I would appreciate a brainiiest 
 
        
                    
             
        
        
        
Answer:
The percent error is 40%.
Step-by-step explanation:
5 (actual time) - 3 (estimated time) = 2
2 divided by 5 (actual time) = 0.4
0.4 x 100 = 40%