Simplify 6-3a + 10b^2- 2a - 4b^2- 3

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.

What ia the sum if the first 7 terms of the geometric series

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer