Answer:
3/10
Step-by-step explanation:
There are 20 marbles.  6 of them are blue.
P = 6/20 = 3/10
 
        
                    
             
        
        
        
Answer:
2a + 3b = 5
b = a - 5
Step-by-step explanation:
2a + 3b = 5
b = a - 5
You can write this another way:
2a + 3(a-5) = 5 ( I added the second formula in the first one )
Now you gotta factor out:
2a + 3a - 15 = 5
Here im gonna do plus 15
2a + 3a = 20 ==> 5a = 20
Now if you divide by 5, you get: a = 4
Now you can fill in the second formula again
b = a - 5 (ill fill this in now)
b = 4 - 5 = -1
So, this makes:
a = 4 , b = -1
 
        
                    
             
        
        
        
Divide 305444 by 4
305444 / 4
76361
so
76361 times 4 is equal to 76361