Answer:
1. Expression can be rewritten as
and

2. The expression for total cost for a visit =
and the Total Cost to visit the fair for 20 tickets is

3. B.

Explanation:
1. Solving for first Question
Given expression are
and

Solving equation we get,

Expression can be rewritten as
and

2. Solving for 2 Question
Given
Fixed cost of carnival =

Additional Cost per ticket for food and ride =

represents number of tickets.
Total cost to visit carnival = Fixed cost of carnival + Additional Cost per ticket for food and ride
Number of tickets =

algebraic expression to represent the total cost for a visit to the carnival =

Now Number of tickets sold n = 20
Total cost to visit carnival=

Total Cost to visit the fair for 20 tickets is

3. Solving for 3 question.
Given :

Solving Above equation we get:

Hence the answer is B.
