Step-by-step explanation:
solving functions separately.
1st: from given data taxi charges $1.00 for the first mile.so it is first rule of function.

2nd: the company charge $0.20 per tenth of a mile.so 2nd rule of the function will be

simplifying


, 
piece wise function is f(x)={2 , 0<x<1
{x , 1<x<2
the graph of the function is given below
4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,And 50!
3x-10+2x=115
5x-10=115
5x=125
x=25
m<b=3(25)-10=65
m<C=2×25=50