Ellie is driving at a speed of 55 miles per hour. let h represent the number of hours that ellie drive at this speed. write an algebraic expression to represent the number of miles that ellie drives during this time

The answer of this word problem is:
y=55h

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.