Fie funcțiaf:R → R, fx) = x² + ax + b. Determinați a, be R, astfel încất parabola asociată graficului funcției ƒ să aibă vârful în punctul V(-1, –4).

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 (%)

If i have 20$ and i gave 5$ away how much i got

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.