66 is the answer because it is easy as that
You have to change each groschen to be equal to Y and then input it into a graphing calculator to get the points
F(4)=4+3
f(4)=7
g(-2)=13(-2)-5
g(-2)=-26-5
g(-2)=-31
7-31=-24
C
A reflection of horisontal
Well, to find the slop regardless, you do (Y2 - Y1) Divided by (X2 - X1). It is the same thing when finding the slope of any line.
Ex: (4,5) and (8,6). What is the slope? (6 - 5) / (8 - 4) = 1/4 <--- Slope
Please leave a thanks because you are welcome. Hope this helps :)