I think the answer is A. Cause your supposed to subtract so 7n-4n=3n, and 3-2=1 :) I hope this helps
        
             
        
        
        
Answer:
120 students students could be expected to not be wearing a jacket
Step-by-step explanation:
Based on this, we can work with the assumption that 3/5 of the students that entered the stadium were wearing jackets.
Given that the total population of students that attended the game is 300
This means that 3/5 of the 300 = 180 students.
180 students were estimated to be wearing jackets. 
The number of students that were without jackets is 300 - 180 = 120 students
 
        
             
        
        
        
He would change his tires a total of 4 times.
You divide the numbers like so:
160,000/40,000=4
        
                    
             
        
        
        
Well in a right angle triangle, we know that angle C would be 90 degrees, we can check this by solving for X and seeing if the expression 2x will give us a value of 90 degrees. 
So 2x = 90
X = 90/2
X = 45 degrees. 
90 = 2x 
90 = 2(45)
90 = 90. 
Thus since the equation is true, X = 45 degrees, we can also solve for the remaining angles knowing what X is.
        
             
        
        
        
A because they all something I forgot but a