Johnny is buying watermelons. Safeway is running a sale where all watermelon purchases are $15 off the final price and each watermelon costs $3.50. Write a linear
equation that models this scenario.

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 (%)