I need help with these questions

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?