Answer:

Step-by-step explanation:

Current year is 2016
born year is 1977
old
2016 - 1977
39 years
Answer:
The answer would be -35.
Step-by-step explanation: (14-48) + (93 DIVIDED BY (-95))= -34.9789473684 WHICH ROUNDS OUT TO BE -35.
Therefore 
Step-by-step explanation:
Given,





Therefore 
There are 20 gallons of 20% butterbeer solution.
Assume there are x gallons of 80% solution.
So total amount of the solution will be (x+20) gallons
The final solution is 50%.
So, we can set up the equation as:

.
Thus, there will be 20 gallons of 80% butterbeer solution that is needed to be mixed with 20 gallons of 20% butterbeer solution.