I have attached the questions above pls help me ASAP I will give the person with correct answers brainliest as reward

Which value of c would make he following expression completely factored? 8x+cy

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?