PLEasE i need help brainlist if u get right

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

At which value in the domain does f(x) =0?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)