SOLUTION: how many grams of 1 hydrocortisone cream and 5 hydrocortisone cream are needed to prepare 60 grams of 2.5% hydrocortisone cream?

Algebra ->  Expressions-with-variables -> SOLUTION: how many grams of 1 hydrocortisone cream and 5 hydrocortisone cream are needed to prepare 60 grams of 2.5% hydrocortisone cream?      Log On


   

Question 1158630: how many grams of 1 hydrocortisone cream and 5 hydrocortisone cream are needed to prepare 60 grams of 2.5% hydrocortisone cream?
Found 2 solutions by greenestamps, josgarithmetic:
Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!


You need to provide some information about what "1 hydrocortisone cream" and "5 hydrocortisone cream" are....

Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
A guess might be that the dropped units for the concentration of cortisone cream is "percent".

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How many grams of 1% hydrocortisone cream and 5% hydrocortisone cream are needed to prepare 60 grams of 2.5%,...
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Using v for how much of the 5%, and 60-v for the 1%:

1%2860-v%29%2B5v=2.5%2A60
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60-v%2B5v=2.5%2A60
%285-1%29v=2.5%2A60-1%2A60
highlight_green%28v=60%28%282.5-1%29%2F%285-1%29%29%29, and from here you can do the rest.