What are some expressions equivalent to 12x + 4?

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

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

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)