. -((-55) + 2)
How to solve this including step by step

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 is the quadric regression equation that fits these data

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41