Again the auction house raffle sold 200 tickets at $1 each. how many prizes of $10 should they to make the raffle a fair game?

Ihave trouble finding the nth term of a linear sequence

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 (%)

What is the anwers for 9+2x=5x-3-x