Please help 5/2 (2m - 4/5) = -(m+2)

What is the smallest integer n such that n\sqrt{2} is greater than 20

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.

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?