Circle and squares are in the ratio 2:3 what fraction are circles

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 (%)

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*