Find the area of a rectangle with a perimeter of 54 meters if it's length is 3 meters less than twice the width ?

Which will form a composite function?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?