I’m not hundred percent sure must I believe it’s 0
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An angle measures how how much you have to rotate one line called <em>initial side</em> so it lies on the top of other line called the <em>terminal side. </em>Angles whose vertex is located at the origin having the initial side on the positive x-axis is said to be in standard position. On the other hand, coterminal angles are angles in standard position having the same terminal side. In this way, for the angle:

Answer:
photo is not clear
take screenshot.after zoom
then send me
X^2 - 8x = -10 .....u would add 16 to both sides
x^2 - 8x + 16 = -10 + 16
take half of ur x term, ur x term is -8, half of it is -4, then u square it...-4^2 = 16, and that is what u add to both sides