Answer:
All non-terminating decimals
Step-by-step explanation:A real number has to be written a  fraction form 
ex  √2=1.41421356237
 
        
                    
             
        
        
        
Answer:
(2,20)
Step-by-step explanation:
The given function is 

To see which point is not on this curve, we must substitute the points to see which does not satisfy the equation;
For the first point we substitute x=3 and f(x)=250

This is true.
For the second point (2,20), we put x=2 and y=20 to get:

This is false, hence (2,20) does not lie on this curve.
For (1,10), we have:

This is also true 
Finally for (2,50), we have;

This is also true.
 
        
             
        
        
        
Answer:
0.1
Step-by-step explanation:
chance of pulling out a blue marble can be described as 8 equally probable outcomes (blue marbles) out of 20 equally probable outcomes (all marbles).
Similarly, the chance of pulling out a green marble is 5 out of 20.
In total, we have 8*5 (combinations of blue then green) outcomes out of 20*20 (any two marbles):
8*5 / (20*20) = 40 / 400 = 1/10 = 0.1
 
        
             
        
        
        
Do 42 divided by 15 then divided 12 by the awnser. And you do 42 divided by 28 and divided that by 12 I think I'm pretty sure