13 I think because they give everyone the same amount
To solve this, simply switch the X and y variables within one equation, and upon doing so, see and check if it equals to the other equation.
f(X) = -X + 4/5
Y = -X + 4/5
X = (-Y+4)/5
5X = -Y + 4
-Y = 5X - 4
Y = -5x + 4
Yes, by looking at the second equation it is an inverse of the first one.
<u>I'm very sorry but i don't know the answer to this queshtion</u>
The answer is you need to post a pic in order to give help
