Answer:
20 grams of an alloy containing 25% silver has to be melted with 50 grams of an alloy containing 60% silver to obtain a final alloy containing 50% silver
Step-by-step explanation:
Hi
We define
 , wich means alloy a has 50 grams containing 60% silver.
, wich means alloy a has 50 grams containing 60% silver.
 , wich means alloy b has x grams containing 25% silver.
, wich means alloy b has x grams containing 25% silver.
So we can build an equiation  , as half of the final alloy has to be silver. Then solving for x
, as half of the final alloy has to be silver. Then solving for x

Wich means 20 grams of an alloy containing 25% silver ( ) has to be melted with 50 grams of an alloy containing 60% silver (
) has to be melted with 50 grams of an alloy containing 60% silver ( ) to obtain a final alloy containing 50% silver.
) to obtain a final alloy containing 50% silver.
 
        
             
        
        
        
Answer:12c
Step-by-step explanation:
hey thays ort 
 
        
                    
             
        
        
        
Answer:
 ![\[=>x\geq 4\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%5Cgeq%204%5C%5D)
Step-by-step explanation:
Given inequality is ![\[−7\geq13−5x\]](https://tex.z-dn.net/?f=%5C%5B%E2%88%927%5Cgeq13%E2%88%925x%5C%5D)
Simplifying:
 ![\[5x\geq13+7\]](https://tex.z-dn.net/?f=%5C%5B5x%5Cgeq13%2B7%5C%5D)
 ![\[=>5x\geq20\]](https://tex.z-dn.net/?f=%5C%5B%3D%3E5x%5Cgeq20%5C%5D)
 ![\[=>x\geq \frac{20}{5}\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%5Cgeq%20%5Cfrac%7B20%7D%7B5%7D%5C%5D)
 ![\[=>x\geq 4\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%5Cgeq%204%5C%5D)
Hence the solution for the given inequality is represented by  ![\[=>x\geq 4\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%5Cgeq%204%5C%5D)
This means that the original inequality will be true only for those values of x which are greater than or equal to 4.
 
        
             
        
        
        
Answer: C. -3y+14
Step-by-step explanation:

Move 3y to ther right side.

So the answer is C. Because x = -3y+14.