D. 40 degrees because angle 8 is the same as angle 4. angle 4 is 50 degrees
Answer:
380
Step-by-step explanation:
640/2=320
320-60=260
640-260=380
Naming the circle is just the only point in the center of the circle (E). The radius is half diameter of the circle so imagine a line connecting the center dot to any dot to the outside. An example of this would be (EC). The diameter is half the circle so any 3 points that cut the circle in half. This could be either (DEC) or (AEB).
So the answers would be:
A: (E)
B: (EC)
C: (DEC)
D: (AEB)
The answer is c (x+21) and (x-2) you have to find two numbers that multiply yo give you -42 and add to give you 19