If jessie is 24 years younger than her mother and if the sum of their ages is 84, how old is jessie?

Name the most appropriate metric unit for each measurement like the mass of cow

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=