Help pleaseee it’s the middle one :) I will give brainliest

Abcd is a square. what is the measure of angle bac

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

(03.03 mc) choose the graph below that correctly represents the equation 2x + 4y = 24. (5 points) select one: a. line through the points 0 comma 6 and 12 comma 0 b. line through the points 0 comma negative 6 and 12 comma 0 c. line through the points 0 comma negative 12 and 6 comma 0 d. line through the points 0 comma 12 and 6 comma 0