21 points :}} if you help

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

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)