Answer:
Step-by-step explanation:
Okay, so if i remember, you do the hyphens first. then move the equations down, then i think you move some numbers on one side to the other, like this, -4+10=6+9 -4+10-6=24 this is not actually correct, it's just an example.
Answer: 65 kmh
70 kmh for 2 hours = 140 km.
63 kmh for 5 hours = 315 km
140 + 315 = 455/7 total hours = 65 kmh
A.
Because they are both subtracting, both lines have to go to the left
a(n-1)(0.5)
