The admission fee at an amusement park is $12.75 for children, $19 for adults, and $13 for seniors. On Monday, 4230 people entered the park, and the admission fees collected totaled $60615. Typically on any
given day, the number of seniors who enter the park is about 700 less than the number of adults who come.
On Monday, how many children, seniors, and adults were admitted?
Write a system of equations; solve using your calculator and the matrix key.