What is the Euler's formula of solving the number of faces, vertices or edges on a polyhedron?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]