Please answer this!?

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?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?