Step-by-step explanation:
4/5 divide
0.8 is the ans
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!
Answer:
The answer is "19.89".
Step-by-step explanation:
Given:

Solution:






that's why the answer is correct.
The third one is true
good luck
Answer:
Step-by-step explanation: