Sheila is now 15 years older than her younger brother sanjay. ten years from now, sheila will be twice as old as sanjay. find the present age of each of them

Sheila is 20

Sanjay is 5

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.