Calculate the slope between the following points ( 1, 6 ) and ( 3, -7 ) ??answer fast plz

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

Find the smallest number by which the given number should be divided to make a perfect cube(with steps or the answer will get reported) a.108 b.2187

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]