Clara has a garden that is 7 feet wide and 4 feet long. she has 30 tomato plants to put in the garden. each plants needs 1 square foot of space. how many leftover plants will clara have?

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?