Multiplying the polynomials (m+2n+6)(m−7) options: m^2+6m-14n
-7m+2mn-42
m^2-m-14n+2mn-42

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Find the vertex of the function given below y=x^2-6x+1

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle