When i was 2 years old, my sister was half of my age. now im 80 years old, how old is my sister?

(6.03) what is the constant term in the expression 6x3y + 7x2 + 5x + 4? (input a numeric value only.) numerical answers expected! me pls! fast pls

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.