Quin walks with a velocity of 1.6 m/s east. she does so while riding on a conveyor belt that moves at a velocity of 0.3 m/s west. what is quin's velocity?

Quin's velocity is given by the resultant of the two velocities. If we assume east as positive direction, the two velocitiies are:
is Quin's velocity in his reference frame
is the belt velocity (with a negative sign since it is due west)

Therefore, the resultant is

and the sign tells us the velocity is due east.

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