Replace ∗ with a monomial so that the derived equality will be an identity: (15y + ∗ )2 = 225y²+6x³y+0.04x^6

(I need the answer for this quickly.)

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.