Answer:
1
Step-by-step explanation:
÷ 
= 
=
=
=
=1
Answer:
The vertex is the point E
Step-by-step explanation:
we know that
The angle marked in the figure is the angle 
therefore
The vertex is the point E
Answer: 2
Step-by-step explanation: +1 is a real number and other +1 is is also a real number so 1+1 is 2.
15/4 would be your answer
1,4,3, though im not so sure about #3