Perfumes are made using different concentrations of scents to create unique fragrances. Suppose perfume is made from t ounces of 15% scented Thalia and b ounces of 40% Thalia. You want to make 60 oz. of a perfume that has 25% blend of Thalia.

How many ounces of each concentration of Thalia are needed to get 60 oz. of perfume that is 25% strength Thalia?

1 answer

To begin, let's assume that the perfume is made up of x ounces of 15% scented Thalia and y ounces of 40% scented Thalia.

According to the problem, the total amount of perfume is 60 oz, so we have:
x + y = 60 ----(1)

We also know that the desired strength of Thalia in the perfume is 25%, so the amount of Thalia in the perfume should be 0.25 * 60 = 15 oz.

The amount of Thalia in x ounces of 15% scented Thalia is 0.15x, and the amount of Thalia in y ounces of 40% scented Thalia is 0.40y.

Therefore, we have the equation:
0.15x + 0.40y = 15 ----(2)

Now, we can solve equations (1) and (2) simultaneously to find the values of x and y.

Multiplying equation (1) by 0.15 and subtracting it from equation (2) multiplied by 0.40, we get:
0.40y - 0.15x = 15 - 0.15 * 60
0.40y - 0.15x = 15 - 9
0.40y - 0.15x = 6 ----(3)

Now, we can solve equations (1) and (3) simultaneously to find the values of x and y.

Multiplying equation (1) by 0.15 and equation (3) by -1, we get:
0.15x - 0.15y = 0
-0.15x + 0.40y = -6

Adding the two equations together, we have:
0.15x - 0.15x + 0.40y + 0.15y = 0 - 6
0.55y = -6
y = -6 / 0.55
y ≈ -10.909

Since we can't have a negative amount of perfume, it means the assumption is incorrect. The problem as formulated has no solution.