two planes are traveling toward eachother and are 950 miles apart. One plane is flying at 170mph. The other is flying at 210mph. In how many hours will the planes land

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?