Fill in the blank to get the product

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Through non-collinear points there is exactly one plane.

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9