Whats the answer here? Please tell!

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

9/10 divide by -3/15 as a mixed number

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x