PLEASE HELP I need to finish this in 20 minutes

Point a is located at (0, 4), and point c is located at (−3, 5). find the x value for the point b that is located one fourth the distance from point a to point c. −0.25 −0.5 −0.75 −1

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

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how