You didn’t attach a photo can you tell me if there were numbers
        
                    
             
        
        
        
Answer:
16 tickets
Step-by-step explanation:
15.50-3.50=12
12/0.75=16
 
        
             
        
        
        
Hello : 
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is :
</span><span>Δ = b² -4ac
1 )  </span>Δ > 0  the equation has two reals solutions : x =  (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ <span>< 0 : no reals solutions</span>