A is not right. Half the cookie would have an angle of 180
B is not right. 4 pieces would have an angle of 288
C is correct. 360/5 is 72 degrees
D is not right. 2 pieces would have an angle of 144
E is correct 90<144 so a 90 degree angle would fit in 2 pieces
A non-negative root of a number is called Square Root
Answer: m = 
Step-by-step explanation:
Turn the equation into slope-intercept form: 
Reduce: 
Your parallel slope is: 
Z-4/9-1/3=5/9
z-4 =5/9(9-1/3)
z-4 =4.414814815
z =8.814