So first I saw that u need 1 adult with every 6 children so I did 6*4 and got 24. From that I got 4 adults with 2 leftover children. For the other class which has 28 children, u would still need 4 adults. Now since u said the teacher is included as an adult only 3 more are needed for the trip, and that is your answer.
2.5(v) + 25 <span>because the 2.5 is the independent variable that never changes.</span>
Answer:

Step-by-step explanation:

You can confirm this by working and expanding backwards:

Hope this helps!