Answer:
oD is function
Step-by-step explanation:
(2,4),(-1,6),(-8,2),(2,3) is function
<h2>Answer</h2>

<h2>Explanation</h2>
1. Use Distance formula
Important to use distance formula in such problems, so keep this formula memorized for future use.
The formula to find distance amongst two points is

2. Plug in the numbers into the formula:
1 -(-1)^2 + 3 - (-3)^2


36 + 4 = 40
3. Find the square root of 40.

Simplify further:

Revenue/Price: $2.38
Gross Profit: $1.43
Your writing is very very good
x = liters of 20% solution
Mixing the 20% solution with the 60 L of 90% solution gives a new mixture with volume (x + 60) L. Each L of the 20% solution contributes 0.2 L of alcohol and thus a total of 0.2x L of alcohol, while the 60 L of 90% solution contributes 54 L of alcohol.
We want the concentration of the new mixture to be 80%, so we require

Solve for x:



So you will need 30 L of the 20% solution.