Answer:
B. -12
Step-by-step explanation:
The given limit are;
and 
We want to find;

We substitute the given limits to obtain;


7 students and 6 adults (I think lol sorry if I'm wrong)
Answer:
67
Step-by-step explanation:
because the total amount is 180.
so there is 23 +90+x=180so find the number the number is 67
23+90+67=180