I think it is 9 6/9 but im not quite sure .
I’m a little confused by the question and the problem, is there a picture of the problem you could add?
Check the attached file and let me know what you think.
Answer:
AC ≈ 9,7sm
Step-by-step explanation:
AB=7 One side of a right triangle
BC=12 Hypotenuse of a right triangle
AC=?=x The other side of a right triangle
x²+7²=12²
x²=144-49
x²=95
x=√(95) ≈ 9,7
AC ≈ 9,7sm