At midnight the temperature is -6 degrees Celsius. By midday the temperature is 9c. By how much did the temperature rise?

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

How can you decide witch operations to use to slice a two step equation

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.