If your asking to multiply 9x5 then the anwser is 45.
39/1.5=26 for the 1.5 hours difference.
divide 26/2=13 for each person.
divide 4/2 for the speed increase of person north. The speeds much average to 13.
subtract 13-2=11 and add 13+2=15 for south and north.
north speed is 15 km per hour and south is 11 km per hour.
Answer:
c) (i) 33
Step-by-step explanation:
You have
![(f\circ g)(x) = f(g(x)) \implies (f\circ g)(7) = f(g(7))](https://tex.z-dn.net/?f=%28f%5Ccirc%20g%29%28x%29%20%3D%20f%28g%28x%29%29%20%5Cimplies%20%28f%5Ccirc%20g%29%287%29%20%3D%20f%28g%287%29%29)
So, we have to compute g(7) and feed it as input to f(x). We have
![g(7)=7-6=1 \implies f(g(7))=f(1)=-5-1=-6](https://tex.z-dn.net/?f=g%287%29%3D7-6%3D1%20%5Cimplies%20f%28g%287%29%29%3Df%281%29%3D-5-1%3D-6)