Someone help me please ASAP this is the only one I need

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

Rounded to the nearest tenth, what is the value of x