Answer:
-1.2
Step-by-step explanation:

Subtract 3.9 from -9.18 to isolate the variable.

Divide -13.08 by 10.9

Which equals

I get:
24 = 3x-12
add 12 to both sides
36 = 3x
divide each side by 3 and you will get 12
I believe the answer would be 1.17
multiply the percentage of the corn by 360 degrees
15% × 360° = 54°
The first fourth and sixth would be the answer