What is a good easy science project

What is the value of y? round to the nearest tenth

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?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers