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 2 years ago
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
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

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Claire4christ
 2 years ago
Best ResponseYou've already chosen the best response.0Problem 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.

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

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

andriod09
 2 years ago
Best ResponseYou've already chosen the best response.0at 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.

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

Chlorophyll
 2 years ago
Best ResponseYou've already chosen the best response.115 * 20 + 10x = 12 ( 20 + x) @Claire4christ Can you continue?

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

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

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

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

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

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

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

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

Chlorophyll
 2 years ago
Best ResponseYou've already chosen the best response.115 * 20 + 10x = 12 ( 20 + x) 300 + 10x = 240 + 12x

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

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

Chlorophyll
 2 years ago
Best ResponseYou've already chosen the best response.115 * 20 + 10x = 12 ( 20 + x) 300 + 10x = 240 + 12x > 2x = 60 You should make each line worth your while, instead of jumping all over !!!

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

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

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