What is the axis of symmetry and vertex for the function f(x) = 3(x – 2)2 + 4?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

What is the value of x when x + 7 = 21?