Which ordered pair is a solution of the equation? -3x-y=6

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality