What is the volume to both of these

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

The sum of two numbers is 86, and their difference is 20. find the two numbers

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36