S/4-6.8=-9.8
S/4= -9.8+6.8
S/4= -3
S=-3*4
S= -12
If Nick starts with 20, we can just plug it into p/2 - 12 to get 10-12 or -2. This means Nick did not get 20 cards. Now we have answered both. Two-liner!
Answer:

Step-by-step explanation:
Given


Required
Determine the average speed
This is calculated as thus:

Convert time to hour:








