Answer: Try 21
Step-by-step explanation:
 
        
             
        
        
        
The expression you want to simplify is 0-(x-y).
0-(x-y)
=-(x-y)
=-x+y
You just have to treat the negative sign in front of (x-y) as a -1 and distribute it to both x and -y.
        
                    
             
        
        
        
They are all larger than 90 degrees, and in a triangle they would all be obtuse angles.
        
                    
             
        
        
        
Answer:
3
Step-by-step explanation:
you first need to convert 9 hours into minutes:
9*60=<u>5</u><u>4</u><u>0</u> minutes
162 jumps ---in--- 540 minutes
? jumps ---in--- 10 minutes
?= (10*162)/540 
?= 3