A. 170 students out of the 230 students love both biking and skating (to make it easier, the percentage is about 0.74).
I am sorry if I cannot solve the other half of your question
        
             
        
        
        
Answer:
z = 60
Step-by-step explanation:
100+20+z=180
120+z=180
z=60
 
        
             
        
        
        
Answer:
um
Step-by-step explanation:
ok?
 
        
                    
             
        
        
        
Answer:
After 100 songs
Step-by-step explanation:
2.50x=1.50x+50
.50x=50
÷.50
X=100