Answer:
increasing 
Step-by-step explanation:
 
        
             
        
        
        
She spends 14 days in Texas
 
        
             
        
        
        
The answer to the question is 2,085,000
        
             
        
        
        
Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!