PLEASE HELP GIVING BRAINLIEST.
Find the measurement of ∠DOC Round your answer to the nearest whole number
∠DOC = degrees

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?