Whats the answers i dont understand

Which of the following expressions is equal to 2x^2+8

Match the one-to-one functions with their inverse functions.

What is the solution for the following system of equations? use any method to solve. 2x + 8y = 4 x = -3y + 5 question 4 options: x = 14, y= -3 x = 2, y = -3 x = -3, y = -3 x = 12, y = 5