That’s not enough information to say how long he could do it. He could go slower or faster than her but by how much if so. So it’s not enough info.
Answer:
1. 9-2=7
2. -6-(-4)=-2
Step-by-step explanation:
a=9
b=2
c=-6
d=-4
The explanation is on the picture I attached!
Hope you get it!