What is the measure of the missing angle? 56, 36, ?

Which best explains why this triangle is or is not a right triangle?

Find the zeros of each function. f(x) = x^2 + 5x - 6

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3