given that expression P dollars for every Q items describes a unit price which statement must be true

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

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 (%)

Consider the linear function that is represented by the equation y= 4x+5