1.9
9.5% = 0.095
0.095* 20 = 1.9
Use substitution...
x-2(2x-3.5)=-14
x-4x+7=-14
-3x=-21
x=7
Plug in x into one of the equations to get y...
y=2(7)-3.5
y=10.5
(7,10.5)
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Answer:
I don't know sorry
Step-by-step explanation:
Answer:
Step-by-step explanation:
15
Given :
An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 50 g of an alloy containing 12% copper with 78 g of an alloy containing 92% copper.
To Find :
How many grams of copper are in the resulting mixture what percentage of the resulting mixture is copper.
Solution :
Mass of copper in 50 gm alloy =
.
Mass of copper in 78 gm alloy =
.
Total mass of copper, ( 6 + 76.44 ) gm = 82.44 gram.
Percentage of copper in resulting mixture :

Hence, this is the required solution.