Quería saber el problema este q no me se la respuesta ​

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Consider the function f(x)=-5x+3 what is f(-2)

If i have 20$ and i gave 5$ away how much i got