Answer:
55 adult tickets were sold on Friday.
Step-by-step explanation:
A linear system will be used to model the system.
Let c be the number of child tickets and a be the number of adult tickets
Then according to given statements

From equation 1

Putting this in equation 2

Putting c = 78 in equation 1

Hence,
55 adult tickets were sold on Friday.
You’re correct answer is the first
Answer:

Step-by-step explanation:
we know that
The expression Subtract
from
is equivalent to the algebraic equation


Group terms that contain the same variable
Combine like terms



Answer:
C. Irrational because it is a non-terminating and non repeating