Jessica is buying several bunches of bananas to make dessert for a fundraiser. She can buy 10 pounds of bananas for $14.90 or 8 pounds of bananas for $12.08 which is the better buy? Explain?

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.

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.