For the order of operation use PEMDAS
Parenthesis
Exponent
Multiplication
Division 
Addition
Subtraction
For memorizing the order you could say
Please
Excuse
My 
Dear
Aunt
Sally
 
        
        
        
Try 3.14x2= 6.28 im so sorry if its wrong
        
                    
             
        
        
        
sprints:  1/8 of 74 1/2 = 74.5 divided by 8=9.3125
Hunts:  3/4 of 57 3/4= 57.75 divided by .75=77
9.3125 + 77=86.3125        86.3125 divided by 2= 43.156 mph average speed
 
        
             
        
        
        
I’m not sure what you’re looking for but I got 11x - 1 = 11 x - 1 and the statement is true
        
             
        
        
        
Answer:
Step-by-step explanation:
<u>Equation:</u>
- cos 28 = 11/x
- x = 11/ cos 28
- x = 12.5 (rounded)