Answer:
(5/15)(4/14) = 4/42 = 2/21
Step-by-step explanation:
 
        
             
        
        
        
84. Area of a triangle is (base x height) / 2
 
        
             
        
        
        
3
Going up 7 and then down 4 can be represented by 7-4=3
 
        
                    
             
        
        
        
2/3 of 300 is 200.
200 +40 = 240.
the total amount of seats minus the amount filled
300 - 240 = 60
That means that there are 60 seats remaining.