What’s the slope I need help

Given f(x) = x − 7 and g(x) = x2 . find g(f( g(f(4))

Danny draws a transversal, t, on two parallel lines ab and cd, as shown below: he makes the following table to prove that the alternate interior angles are equal: which is the missing justification? (6 points) corresponding angles formed by a transversal on parallel lines are supplementary. corresponding angles formed by a transversal on parallel lines are congruent. co-interior angles formed by a transversal on parallel lines are congruent. co-exterior angles formed by a transversal on parallel lines are congruent.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left