Answer:
5 2/11
Step-by-step explanation:
Answer:
the answer is d
Step-by-step explanation:

Answer:
(3×20%+2×70%)/3+2=40%
Step-by-step explanation:
Assuming the potions are the same type or do mix then probably the concentration of the potion depends on the type of reaction they have to each other.
Yet we can average the percentage of the active ingredient by the principle mentioned above

Consider, LHS

We know,

We know,

So, using this identity, we get

can be rewritten as

<h2>Hence,</h2>


Answer:
x = √21.
Step-by-step explanation:
Triangles ADB and BCD are similar.
So their corresponding sides are in the same ratio:
x / 7 = 3 / x
x^2 = 21
x = √21.