I’m supposed to solve this and show my work plz help

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 (%)

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

Is a square always, sometimes, or never a parallelogram