Mary. needs to oder pizza for 18 students. each student should get1/4 of pizza. how many pizzas should mary order? how much pizza will be left over?

There are 8 slices in a pizza. Mary has to feed 18 kids. 2 slices is 1/4 of the pizza. Mary should have to order 5 pizzas and 1/4 will be left over. So that means there will be 2 slices left.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.