What is the pythagram therom

i need a im 15 and im super lonely

Which one ? is the answer and how to find this answer

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Factor the expression using gcf 9b+45