Hey there!
1.) let's remember that a acute angel is very tiny, it is less then 90 degrees. So we would want to find one of your options that would be very small.
46 would seem to be the answer.
x=46
Hope this helps you.
1.330
2.930
3.30
4.80
5.90
6.140
7.10
8.110
Answer:
○ 
Explanation:
This should help you figure out why this is the answer:

I am joyous to assist you anytime.
The complement of 31° is the angle that when added to 31° forms a right angle (90° ).