Please help this is due at 8 i'll mark you brainlist

Which of the following are parts of a sphere

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.