This answer is C i did this once
Can you post the picture please? I’ll help you!
Answer:

Step-by-step explanation:
Given: An angle measures 51 degrees
To find: fraction of a circle by which the angle turn
Solution:
Angle at the centre in a circle is equal to one complete angle i.e., 
Measure of an angle 
Therefore,
Fraction of a circle by which the angle turn = Measure of an angle/ Angle at the centre in a circle 
1 dozen=12 doughnuts so 12x291=3,492 doughnuts
-13 = xy + z....subtract z from both sides
-13 - z = xy...divide both sides by y
(-13 - z) / y = x