Which shape is NOT a trapezoid? I​

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

What could explain what happened when the time was equal to 120 minutes

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)