Answer:
Picture 1:
12x+1=109
12x=108
x=9
Picture 2:
2x-3=57
2x=60
x=30
Let me know if this helps!
Answer:
A
Step-by-step explanation:
We know the following:

so the segment EF is equal to

and here we can do a trick :)

you see it's the same

now we plug the values given

so it's option A
Answer:9/16
Step-by-step explanation:
Since we know it's 3/4 use
r=(3/4)² ....
=
The second one I beileve is the answer to your question