Help please will mark brainlest!!

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.

Simplify the expression 10/11(22z) + (a+5) -1

Which of these tools or constructions is used to inscribe a hexagon inside a circle?