Ok so you spent 19 dollars the difference between prices is 5 dollars and your answer would be 12 and 7. If you need any help let me know.
Answer:
14
Step-by-step explanation:
its an formula which comes in algebraic expression
Answer:
3.98 meters
Step-by-step explanation:
First we need to know the formula for finding the height of a cylinder

Now That we know our formula, we just need to put in our numbers and simplify



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!