What is the answer to 9x – 20 + x2

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Una caja de galletas contiene 16 paquetes y cada una de estas tiene 12 galletas y se quieren repartir entre 6 niños ¿de cuantas galletas le toca a cada niño?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?