a mobile phone company reported a 160% increase in sales in one year. At the start of the year sales were 3 million. What was the sales increase over the year?

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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 (%)

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?