5x + 7x + 2x + 8 -2 please helppp

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work:

The diagram shows a cuboid abcdefgh abcd is a square with area 25cm². find the volume of the cuboid.