Dolly wants to get the best buy on supplies for a large party. which brand of party supplies offers the lowest unit cost for cups?

Could someone with number 1 and 2

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 (%)

Which graph represents the linear function below? y-3=1/2(x+2)