Ascientist mixes water (containing no salt) with a solution that contains 30% salt. she wants to obtain 180 ounces of a mixture that is 15% salt. how many ounces of water and how many ounces of the 30% salt solution should she use?

water : 90 ounces

salt solution: 90 ounces

Step-by-step explanation:

Call w the amount of water and call the solution containing 30% salt.

We want to get 180 ounces of a mixture with 15% salt.

So:

The amount of mixture will be:

the amount of salt will be

Now we substitute the value of s in the first equation and solve for w

answer: what in the world is this

step-by-step explanation: