A certain drug is made from only two ingredients: compound a and compound
b. there are 7 milliliters of compound a used for every 5 milliliters of compound
b. if a chemist uses 295 milliliters of compound b, how many milliliters of the drug will be made?

ratio of A to B is 7:5...

so if there was 295 mL of compound B...
7 / 5 = a / 295
cross multiply
(5)(a) = (295)(7)
5a = 2065
a = 2065/5
a = 413 .... so 413 mL of compound A would be used

for a total solution of (295 + 413) = 708 mL solution <===

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A certain drug is made from only two ingredients: compound a and compound b. there are 7 milliliters of compound a used for every 5 milliliters of compound b. if a chemist uses 295 milliliters of compound b, how many milliliters of the drug will be made?

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A certain drug is made from only two ingredients: compound a and compound
b. there are 7 milliliters of compound a used for every 5 milliliters of compound
b. if a chemist uses 295 milliliters of compound b, how many milliliters of the drug will be made?