A group of 54 people go to an amusement park. An adult ticket costs 12 and a child's ticket costs $9. If the group spent $513, how many adults and how many children went on the trip?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.