With 2-! (image above) i made the settings so that if you answer this question you will get 90 points! you very much!

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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.