please refer to this image
please don't report this answer if it is wrong
but if its correct so please mark me as brainlist
Answer:
tan β = 
Step-by-step explanation:
tan β =
=
= 
First we have to find number of person.
3adults+2childre+Shawna=6 person
Now we have to divide 2 pie by 6 person to see how much pie each person get.
2:6=

- its the result
Answer:
(8x + 1)° + ( 4x+11)° = 180° (linear pair )
8x +1 + 4x +11 = 180
8x + 4x + 1 + 11 = 180
12x + 12 = 180
12x = 180 - 12
12x = 168
x= 168/12
x = 14
Sorry if it's wrong, I tried