Please help will mark Branliest!! Find the number of possibilities using permutations. Image attached.

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.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

What is the value of x in the following equation. -x ^3/2 = -27