Answer:
50
Step-by-step explanation:
Because of supplementary angles that line has to equal to 180
180-75 = 105
so 105 = (2x + 5)
you can subtract 5 from each side and get
100 = (2x)
then divide each side by 2 and you get
x = 50
you can check it by doing (2 x 50 + 5)
2 x 50 = 100 + 5 = 105 + 75 = 180
You should have an angle of elevation of 30 degrees.
I'm not sure what this question means exactly, maybe the principals goal is unrealistic?
For the mean you add them all up and divide by the ammount of numbers you added. So it would be 118
