Find the volume. Show Work

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.

Anyone know? is appreciated! will mark brainliest if correct!

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !