Adoctor prescribes an ointment that is 4% hydrocortisone. a pharmacist has 1% and 5% concentrations in stock. how many ounces of each should the pharmacist use to make a 5-ounce tube? .

ounes of % and ounes of % will be used to make a -ounce tube

Explanation:

let "x" represent the number of ounces of  % concentration

Then the number of ounces of  %concentration would be

Now the total of ounces of  % and  % would be equal to -ounce of % hydrocortisone.

so the equation will be

hence

ounes of % and ounes of % will be used to make a -ounce tube