The sides of a triangle are x, y, and sqrt(x^2+xy+y^2. Determine the Largest Angle.

Answer 1

clearly √(x^2 + xy + y^2) is greater than either x or y

since the largest angle in any triangle is opposite the largest side .....

Answer 2

in 1990 the life expectancy of males in a certain country was 64.7 years. In 1994 it was 67.3 let E represent the life expectancy in year t and let t represent the number of years since 1990.
What is the linear function E(t) that fits the data? what would the life expectancy of males be in 2009?