Yes you got them all correct at least I think.
X + 13 = -4
x = -4 - 13
x = - 17
I am thinking it is the first one..solution is -17
16m/s * 8s = 128m Multiply out the time to get the total displacement from the descent.
128m-71m = 57m Find the displacement from the descent to the ascent and then add that to 1364m to get your answer.
1421m
