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Claire4christ
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And i need help with these problem.
An alloy of tin is 15% tin and weighs 20 pounds. A second alloy is 10% tin. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 12% mixture.
______ pounds
 2 years ago
 2 years ago
Claire4christ Group Title
And i need help with these problem. An alloy of tin is 15% tin and weighs 20 pounds. A second alloy is 10% tin. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 12% mixture. ______ pounds
 2 years ago
 2 years ago

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Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
Problem 1: A jeweler is using an alloy, a mixture of metals. He has 10 pounds of the alloy. 2% is the rare metal robium. He has another source which is 5% robium. He wishes to combine these mixtures to form a mixture that is 3% robium. Solution: 1. Identify the variables. (0.02)(10) The quantity of robium in material 1 (5%)(x) The quantity of robium in material 2 (0.03)(x+10) The quantity of the desired mixture 2. Write an equation. 5% x + (0.02)(10) = (0.03)(x+10) The equation required. 3. Perform the Solution. 0.05x + 0.2 = .03x + 0.3 = 0.02x = 0.1 4. Write the answer. x = 5 The desired amount.
 2 years ago

andriod09 Group TitleBest ResponseYou've already chosen the best response.0
just do what i did. use the percent bar, then the butterfly method. want me to start for you? here: dw:1349374188909:dw
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
sorry its not clear to me i can't see the top number
 2 years ago

andriod09 Group TitleBest ResponseYou've already chosen the best response.0
at the very top, it isn't a number, its the % symbol. all you do is fill it in, the top number, is the number your trying to find, x, the bottom number, not the 100, is the total, then you put what percent you are trying to find below the percent sign and above the 100.
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
so its (0.15)(20) (10%)(x) (0.12)(x+10)
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
15 * 20 + 10x = 12 ( 20 + x) @Claire4christ Can you continue?
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
did you see example above???
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
If you are talking about your post, then it's WRONG!
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
that's one of the examples
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
do you see where it says problem 1 that;s the example
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
can u explain me than plz
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
I just show you the result equation, then you solve it yourself!
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
Multiply the percentage with its mass :)
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
Is it clear to you now?
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
300+10x=240=2x
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
300+240???
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
15 * 20 + 10x = 12 ( 20 + x) 300 + 10x = 240 + 12x
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
60+10x=2x
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
Do you understand my calculation above?
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
Where do you get 60+10x=2x?
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
300240???
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
15 * 20 + 10x = 12 ( 20 + x) 300 + 10x = 240 + 12x > 2x = 60 You should make each line worth your while, instead of jumping all over !!!
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
Now I hope you're fine with x = ...?
 2 years ago

Claire4christ Group TitleBest ResponseYou've already chosen the best response.0
how did you get 15
 2 years ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.1
I just make your life easier by multiplying all with 100 :)
 2 years ago
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