Some one pleas help y=2x+3 y=-2x+15

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.

Aline passes through 3,7 and 6,9 what equation represents the line

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?