64 733
Assignments Done
99,3%
Successfully Done
In September 2018

Answer to Question #32394 in Algebra for Mark

Question #32394
Gold is 19 times as heavy as water, copper is 9 times as heavy as water. in what ratio should these be mixed to get an alloy 15 times as heavy as water?
Expert's answer
Suppose we have 1m^3 of water, 1m^3 of gold and 1m^3 of copper. Then we have for mass fractions 1 for water, 19 for gold and 9 for copper. We want to get 15 units of mass, so we need to get x m^3 of gold and 1-x m^3 of copper
19x+9(1-x)=15
19x+9-9x=15
10x=6
x=3/5
1-x=2/5
then we need to get 3 parts of gold and 2 parts of copper, so ratio is 3:2 gold to copper.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

Assignment Expert
28.06.13, 12:07

This is Algebra question.

Mark
27.06.13, 17:19

Please, what category does this question #32394 belong?

Assignment Expert
27.06.13, 16:43

<div>You're welcome. We are glad to be helpful.</div><div>If you really liked our service please press like-button beside answer field. Thank you!</div><div>
</div>

Mark
26.06.13, 17:42

The answer is absolutely correct. I did it and got the ration to be same. Thanks.

Leave a comment

Ask Your question

Submit
Privacy policy Terms and Conditions