For what value of a does (1/9)a+1 =81a+1 272-a?

Which math sentence can be used to determine if the triangle is a right triangle?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.