Why should we intentionally suppose that '1≠0' when we define the Existence of the Multiplicative Identity? No answer needed!

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Round to the nearest ten thousandth.i dont get this