Answer:
m<y=50
Step-by-step explanation:
The total interior angles of a triangle is 180 degrees. This is a right triangle, the right angle measures 90 degrees. The given angle is 40 degrees. 
Add 90 and 40.
90+40=130
Subtract 130 from 180.
180-130=50
m<y=50
Check:
90+40+50=180
90+90+180
180=180
 
        
             
        
        
        
Here’s the answer and working out. Hope it helps
 
        
        
        
Answer:
Yeah it's 10
Step-by-step explanation:
100/10=10