Twenty-five members of the eighth grade class at park center middle school are going to a museum and then to lunch. each student must pay an entrance fee to the museum and $7.25 for lunch. the total cost for the trip is $443.

25x+181.25=443

Im not entirely sure what the actual question here is but im assuming you need to figure out how much admission was well since. You would set up the equation I gave above, the 35x representing the 25 students being multiplied by the unknown value of the admission and the 181.25 represents the cost of all there lunches (7.25 (cost) x 25 (number of students)