Your teacher decided to redecorate some rooms at home. she purchased two throw pillows for $9.99, paint for $38.50 and some paint brushes for $8. the total cost was $82.48. how many paint brushes did she purchase?

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.