Well, lets add 0.125 to 4.1.
We would get 4.225.
Finally we can check.
4.225-0.125= 4.1
How did we get it? What i did is I did the opposite. Instead of subtracting 0.125 I added it.
N= 4.225
That would be 100 * sin 30 = 100 * 0.5 = 50 pounds
Answer:

Step-by-step explanation:
x² + 6x + 1 = 0
a = 1 , b = 6 , c = 1

(-5, 3) (-2, 6) (-4, -2)
those will be your answers
Use Pythagorean theorem:
9i-j = sqrt (9^2 - 1^2) = sqrt(81-1) = sqrt80
now divide both terms in V by that:
u = 9/sqrt(80)i - 1/sqrt(80)j
see attached picture: