ILL GIVE BRANLIEST PLEASE HELP

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm