Answer:
-1
Step-by-step explanation:

= 
= 
= -1
The average speed is the ratio between the distance covered, and the time elapsed to cover that distance.
The total distance is the sum of the three distances covered:

Similarly, the total time elapsed is

So, althought you didn't always travelled with the same speed, you globally covered 170km in 1.75 hours. This leads to an average speed of

Minutes are equal to 1/60ths and seconds are equal to 1/3600ths so
-128+30/60+45/3600
-128.5125
-128.513° (to nearest one-thousandth of a degree)
Answer:
you will multiply the new price plus the original price