Vicky bought a bicycle originally priced at $40 but on sale for 50% off. After 5% sales tax, what was the total cost? $

The graph shown is the graph of which function?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?