In the accompanying diagram ab is tangent to circle O at B and ACD is a secant. If AB=9 and AD=27, find AC

Solve the system of equations. y= 2x y= x^2 - 15

Which choice represents the sample space ,s for this event

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 (%)