If i am not mistaken C) seems to be the correct answer.
If a woman experiencing an asthma attack had taken two puffs
from her prescribed inhaler before my arrival and there was no relief. I would
first administer supplemental oxygen, and I’ll then proceed to contact medical
control for further advice.
Let’s say John’s age is x. Jim’s age is y. And Dana’s age is z. Then the equation would be:
1.) x + y + z = 167.
We also know that John (x) is 3 years older that Jim (y), so we can make the equation:
2.) y + 3 = x
We know that Jim (y) is 4 years younger than half of Dana’s age (z), so we can make this equation:
3.) z/2 - 4 = y
Now we can combine these equations so that we only have one variable remaining.
The second and third equation can combine to create:
4.) (z/2 - 4) + 3 = x
Then combine the first, third, and fourth equations to have only z as a variable.
5.) ((z/2 - 4) + 3) + (z/2 - 4) + z = 167
Simplify the fifth equation by isolating the variable:
z = 86
Dana’s age is 86. Now plug this into the remaining equations.
86/2 - 4 = 39
Jim is 39. Plug this number into the second equation.
39 + 3 = 42.
John is 42.
FINAL ANSWER:
John = 42
Jim = 39
Dana = 86
They don't mix, therefore the two liquids are separated.
