Pls help
me wjth math

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?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)