Several students and adult chaperones are going on a field trip to the theater. Each student ticket cost $2 and each adult ticket cost $4. The total cost for the trip is $144. There are 4 times as many students as adults going on the trip. If the expression,

2 (4x) + 4x, represents the total cost, what does x represent?

A. the number of adults

B. the number of students

C. the cost of an adult ticket

D. the cost of a student ticket

I think its C because each adult ticket costs 4 dollars

The answer to this question would be: A. the number of adults

In this question, there are 4 times as many students as adults going on the trip. If we put it into a function where s = student and a=adult, then we could get one equation:

1. s=4a

Each student ticket cost $2 and each adult ticket cost $4. The total cost of the trip is $144. We also can get one equation for this

2. 2s + 4a = 144

If you put the first equation into the second, you will get:

2s+4a = 144

2 (4a) + 4a = 144

The function is already similar with 2 (4x) + 4x but it uses a instead of x. Then x = a = number of adult