15 over 5a is the answer 3a?

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.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square