Answer:

Step-by-step explanation:


2x = -11 + 9
2x = -2
x= 2/2
x= 1
Answer:
Step-by-step explanation:
Answer:
63/80 and 7/4 * 9/20
Step-by-step explanation:
7/8 * 9/10 = 63/80
7/4 * 9/20
Answer: 10
Step-by-step explanation: We can just count the number of vertices in the star and each vertex makes an angle. There are ten vertices in a star and thus ten angles.