16 - (24) + (-8 + 6) - (-12 + 4) =
-8 + (-8 + 6) - (-12 + 4) =
-8 + (-2) - (-12 + 4) =
-10 - (-12 + 4) =
-10 - (-8) =
-10 + 8 =
-2
Hope this helps!
Firstly we need to realize that "sea level" is the same as "surface of the ocean" and 0.
It means that Trina the scuba-diver is closer to the surface of the ocean than Jessie the glider because Trina is 85,5 meters from 0 level and Jessie is 87,9 meters from 0 level.
Now if Trina will hang glide at the altitude of 85,5, than she will <em>not </em>fly higher than Jessie (she will fly lower by 87,9 - 85,5 = 2,4 meters).
There is no z in this equation?
X greater than or equal to 2
