What shape had no line of symmetry angle of rotational symmetry 180°

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

How do i do this activity, is appreciated

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?