The store bought them for $100 and marked them up 25% but no one was buying them! So the store discounted them 25%, what is the final price? (Need equation)

Do u just plot the numbers on the graph like (1,

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?

Normal yağmur ile asit yağmuru arasındaki fark nedir