Please show a picture of the diagram.
The answer is 30 because u need to add 60+90=150 and then subtract 180-150 which gives you 30
Mean = (18 + 21 + 17 + 24 + 15) divided by 5
Mean = 95 divided by 5
Mean = 19
X/-9 ≥3 multiply both side by -9 to get rid of fraction
-9/1•x/-9 ≥-9•3
Cross cancel -9 on left side
x ≥ -27