Answer:
the answer is 10
Step-by-step explanation:
add 9+8
subtract ten
get 7
9+8=17-10=7
good luck
I assume the task is to simplify.

Answer: 
Answer:
C. Two-fold
Step-by-step explanation:
When you rotate a line 180 degree, it looks the same, that means it has 2 fold symmetry.
I think it is b but i don't know for certain sorry. Good luck:)