The nth term of a sequence is 2n-1 The nth term of a different sequence is 3n+1

Work out three numbers that are both in sequences between 20 and 40

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.