Elaine's mother is now 38 years old. seven years from now she will be five times as old as elaine will be then. write and solve an equation to find how old elaine is now

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° ?