Step-by-step explanation: This is the correct answer, because a represents adults and c represents children, so a + c = 216 and 216 represents the total number of people that the money was collected from. So, that would be correct for the first part of the system of equations. Next, 5a represents $5 for each adult, and 3c represents $3 for each child. While, 902 represents the total number of money collected at the park. Therefore the answer a + c = 216 5a+ 3c = 902 is the correct system of equations answer. Hope this helps ^-^.