Marissa was decorating her room. she arranged 63 picture tiles on a wall in the shape of a rectangle. how many rows of tiles could be on the wall? a: 2, b: 5 c: 6 d: 9 which could be the answer?

The answer is D. because 9x7=63 and since you don't have 2 of the same number it is a rectangle not a square

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.